#21. Kate Mara In Iron Man 2
Tony Stark sees an astonishingly attractive woman waiting by his car at the start of Iron Man 2, and being the kind of man that he is, he immediately thinks that she wants to go home with him, but that’s not the case.
When he goes to her, she tells him who she really is. Turns out she was just there to give him a subpoena since she was a US Marshal. Well, this woman was played by Kate Mara, you might know her from her role in series House of Cards, or movies like 127 hours and Fantastic Four.
#20. Natalie Dormer In Captain America: The First Avenger
You probably know Natalie Dormer from her roles in Game of Thrones, and The Hunger Games: Mockingjay. But like most people, you probably forgot that she appeared as an Army official called Private Lorraine in the first Captain America movie.
If you still don’t remember her, she was that one girl who called Steve Rogers a hero and then kissed him. All this, of course, before being interrupted by a very angry Agent Peggy Carter, played by Hayley Atwell.
#19. Talulah Riley In Thor: The Dark World
Among other things, Talulah Riley is mostly known for her role in the HBO sci-fi drama Westworld, but she was also in the MCU! She played the role of an Asgardian nurse in the second Thor movie, Thor: The Dark World.
Maybe we didn’t notice her because her role is minor since we can only see her informing Thor about Jane’s condition, or maybe it was because of her costume, which makes her look totally different from what we are used to seeing her in.
#18. Olivia Munn In Iron Man 2
Here is a more forgettable appearance of a famous face in the MCU. Olivia Munn, who is actually known for role in X-Men, which as you might know, is not in the MCU, played the role of a news reporter that was covering the Stark Expo in the second Iron Man Movie.
Fun fact: Olivia Munn used to work as a host on a reality show called Attack of the Show!, abnd she did that for eight years. So when she played this role in Iron Man 2, she felt really comfortable. Soon after that, she decided to take more traditional movie roles.
#17. Stanley Tucci In Captain America: The First Avenger
This one isn’t exactly a forgettable one since everyone noticed Stanley Tucci's appearance in Captain America: The First Avenger. His role in this film was quite important, as he was the one who gave the super-soldier serum to Steve Rogers.
Although such an unusual and remarkable actor who steals every scene he is in, most people have already forgotten he was once part of the MCU, probably because it was the very first Avengers movie ever and it was already years ago.
#16. Ken Jeong In Avengers: Endgame
We all know that Avengers: End Game was pretty much a non-stop of throwbacks and references and all the MCU fans couldn’t complain because they were finally rewarded for their loyalty up until that point. Still, this movie also gave us some enjoyable cameos.
One of them was the Ken Jeong one. He is most known for his many comedy roles,such as on the comedy series Community or in movies like The Hangover and Knocked Up. He appears in Endgame as the confused security guard who ends up letting Scott Lang out of the garage where he emerged.
#15. Tommy Lee Jones In Captain America: The First Avenger
We can see Tommy Lee Jones in Captain America: The First Avenger when Steve Rogers is chosen as a candidate for the super-soldier serum. He then joins a group of soldiers in a military camp led by Agent Peggy Carter and Tommy Lee Jones’s character, Colonel Chester Philips.
We all know Tommy Lee Jones for his other famous roles, like his role in the Men in Black movies. Although he had an important role in the movie, that was his one and only appearance in the MCU and thus, he was quickly forgotten.
#14. Glenn Close In Guardians Of The Galaxy
Glenn Close is such an iconic actress known for a lot of movies, from The Big Chill to 101 Dalmatians. She played the role of the commander of the Nova Crops, Irani Rael, when she appeared in Guardians of the Galaxy.
She sure surprised fans when she did. At one point, her character looked over one of the six infinity stones. But later on, we learn that Thanos wiped her entire planet so he could retrieve the stone she was keeping.
#13. Ving Rhames In Guardians Of The Galaxy Vol. 2
Ving Rhames is a pretty famous and respected actor, and you might remember him for his iconic role as Marcellus Wallace in Quentin Tarantino’s Pulp Fiction or the one in Con Air. With such a career, it is hard to think that he would get only a minor role in Guardians of the Galaxy Vol. 2.
But he did. His character is a space pilot who survived an alien attack that happened on his planet, Charlie-27. We can see him honoring Yondu after he dies in quite a touching moment.
#12. Yvette Nicole Brown In Avengers: Endgame
Both Ken Jeong and Yvette Nicole Brown were both in Community and in Endgame. We can see Yvette briefly when Captain America and Tony Stark go to 1970’s New Jersey to investigate an old military base.
We see her when Cap and Tony are in the elevator and she asks them some questions and then gets suspicious and calls them out. This one is just a cameo since we know that Yvette is not a regular character in the MCU.
#11. Chris Sullivan In Guardians of the Galaxy Vol. 2
As you know, Guardians of the Galaxy Vol. 2 shows a lot of new creatures, some of which are evil. There is a minor villain called Taserface. He is a Ravagers clan member who, with the help of Nebula, leads the rebellion against Yondu.I
Turns out that behind all that makeup and some mean expressions is Chris Sullivan. This time he plays pretty much the opposite of his character Toby, Kate Pearson’s romantic partner, from the TV drama This Is Us.
#10. Sam Neill In Thor: Ragnarok
You probably remember that scene from Thor: Ragnarok where there is an elaborate play within the movie that features a bunch of fake characters. There is fake Loki, a fake Thor, and even a fake Odin.
In case you don’t remember, now we’re gonna tell you who the actor who plated fake Odin was. :Sam Neill, who is known for his role in Jurassic Park and more recently for the series Peaky Blinders.
#9. Seth Green In Iron Man 2 and Guardians of the Galaxy
You probably know Seth Green from Rat Race, The Italian Job, Austin Powers, or for being the creator of Robot Chicken or for being the voice of Chris Griffin on Family Guy. Wherever you know him from, you probably know who he is.
Well, let’s add another role to the list. he actually had a brief cameo on Iron Man 2. He was just a random fan standing in an elevator. And besides that, he also was the voice for Howard the Duck in both of the Guardians of the Galaxy films.
#8. Rene Russo In Thor
If you didn’t look twice when you saw Thor’s mother Frigga, played by Rene Russo, it means you’re probably part of the younger generation. However, the old-timers sure know who the lovely Rene Russo is.
She is probably best known for her role as Wild Thing’s girlfriend Lynn from the sports film Major League. Even though she appeared in both the first Thor movie and Thor: The Dark World, she doesn’t have many lines. But this can be considered a worthy cameo.
#7 .Trevor Noah In Black Panther
We all know how in Black Panther there is an artificial intelligence named Griot that is the voice of a Wakandan Ship, which we can hear when Everet Ross, played by Martin Freeman, pilots said ship.. What most people haven't realized is that Griot's voice belongs to a popular late-night TV host.
Believe it or not, we were hearing Trevor Noah the whole time. If you watch it again now, you will probably recognize him, especially because of his distinct South African accent.
#6. Danny Pudi In Captain America: The Winter Soldier
I know what you’re thinking and yes, another Community actor that appears on the MCU. This time it’s Danny Pudi, and he appears in Captain America: The Winter Soldier, playing a SHIELD member who gets held up at gunpoint.
But nothing happens to him, phew! He is later saved by the good guys, in this case, Captain America, Falcon, and Maria Hill who just wanted to save the day by taking over the communications room where Danny Pudi’s character was.
#5. Justin Theroux In Iron Man 2
Justin Theroux just loves appearing in random places on the big screen. Even though he starred in The Leftovers, he doesn’t have many distinguished leads, but he still has many talents and does lots of work behind the screen.
He is seen for a short moment in Iron Man 2. He plays a cop that has a brief conversation with Pepper Potts. But actually, Justin was also one of this film’s screenwriters, because as I told you, he has many talents.
#4 .Christopher Eccleston In Thor: The Dark World
Now we have Christopher Eccleston, who was the ninth Doctor Who in the year 2005, appearing in the MCU. He has the role of the primary villain in the second Thor movie, Thor: The Dark World.
The name of his character is Malekith. This villain is looking for one infinity stone, the Reality Stone to be more precise, so he can then take over the world. And just a fun fact, Eccleston was also in The Leftovers alongside Justin Theroux.
#3. Matt Damon In Thor: Ragnarok
You now know about the fake Odin from Thor: Ragnarok and how he was played by Sam Neill.Now we have the fake Loki, played by an Asgardian actor so the real Loki could be entertained while he sitting at his throne.
It’s Matt Damon, in case you couldn’t tell from the picture. And don’t feel bad if you didn’t because most people didn’t even realize that Matt Damon had a cameo in the MCU. Everyone is surprised when they find out about it.
#2. Luke Hemsworth in Thor: Ragnarok
Finally, you’re about to learn who was the actor that played the fake Thor in the play from Thor: Ragnarok. It was Luke Hemsworth, yes that’s right, Chris Hemsworth’s own brother.
We already told you about the other ones; fake Loki was Matt Damon, fake Odin was Sam Neill and now with Luke Hemsworth hilariously playing the role of his real-life brother’s character, we have the complete cast. That would be one play to watch, right?
#1. Miley Cyrus In Guardians of the Galaxy Vol. 2.
Yes, Miley Cyrus does appear in the MCU. But you had to be quite observant to notice. She appears in the post-credits scene of Guardians of the Galaxy Vol. 2, as is the voice of Mainframe, a tiny robot that only has the one line.
Well, if you go see it now and pay attention you will probably notice that the voice of Mainframe is filled with Miley’s energy. This cameo is one that shocks the people that are first hearing about this.