HE'S the charming, affable, funny lead in films such as Bridesmaids and This Is 40.
So it will come as a surprise to many of Chris O'Dowd's fans that he will soon be seen in Marvel Films' Thor, which stars Chris Hemsworth and Natalie Portman.
O'Dowd (33) has just completed filming his scene – and has hinted that it will be a cameo that he did for 'fun'.
In a recent interview, the newly married actor said: "Actually, you know what I've done, just for fun because I didn't think there was any way that I could be in a superhero movie, so I've done a scene in the new Thor movie, just for that. I just do one scene, which was quite fun."
He also told fans via Twitter that he had just filmed a scene with Natalie Portman.
O'Dowd's career is going from strength to strength, and if the trailer for his latest comedy, Family Tree, is anything to go by, he has another hit on his hands.
The BBC/HBO mockumentary was written by This Is Spinal Tap and A Mighty Wind creator Christopher Guest.
It tells the story of loser Tom Chadwick; a 30-year-old who has just lost his job and his girlfriend, Sarah.
To get over being dumped, Tom sets off to the States to meet his embarrassing and eccentric relations.
Shot in LA and London, the show was largely improvised and Chris says, while he enjoyed working with the team, at times he felt a little out of his depth.
"I was with Chris and a bunch of his people and I enjoy their company," he told the Herald.
"But they are real heavyweights. And I'm monumentally underqualified. I felt like this big toddler spewing up broccoli next to these legends, these giants of men."
Guest said he has been a fan of Chris for many year: "Chris O'Dowd has been on my radar ever since he was a child actor in Wales."
O'Dowd has high hopes for the eight-part series, and says he has been very lucky landing such popular and enjoyable shows.
"I'm very lucky that all the jobs I don't get, don't turn out to be great. It's great working with people who are so funny and talented."
British actor Tom Bennett, who starred in cult TV show Phone Shop, and Anchorman's Fred Willard also star in the series.
O'Dowd is becoming a regular on US TV; he recently played DJ Thomas-John in hit series Girls, with Lena Dunham.
O'Dowd, who married broadcaster Dawn Porter last year, says he spent his spare time on set teaching the American actress Irish slang words: "Just the common things. But they're not broadcastable."
He also took home the IFTA for Best Entertainment.