Claim: Chris O'Dowd starred in Girls.

Christopher `` Chris '' O'Dowd -LRB- born 9 October 1979 -RRB- is an Irish actor , best known for comedic roles such as Roy Trenneman in the Channel 4 comedy The IT Crowd . O'Dowd created and starred in the Sky 1 television series Moone Boy , which aired between 2012 and 2015 . He had a recurring role on the drama series Girls and starred in the television series Family Tree .   O'Dowd is also known for his film roles , most notably Bridesmaids -LRB- 2011 -RRB- , This Is 40 -LRB- 2012 -RRB- , The Sapphires -LRB- 2012 -RRB- , Thor : The Dark World -LRB- 2013 -RRB- , Calvary -LRB- 2014 -RRB- , and St. Vincent -LRB- 2014 -RRB- . He made his Broadway debut in the play adaptation of Of Mice and Men in 2014 , for which he was nominated for a Tony Award .