Imogen Poots has been cast as Zac Efron's leading lady in Are We Officially Dating?
The former High School Musical actor signed up for the new romantic comedy last month, and now British actress Imogen has been added to the billing, Deadline reported.
The film follows three male friends who make a pact to stay single. Soon after they swear off romance, all three start to fall in love.
True Blood's Deborah Ann Woll has also been signed up to play the ex-wife of one of the friends.
Tom Gormican will direct the film and also wrote the script, which was on Hollywood's Black List of the best screenplays yet to be made in 2010.
Shooting is due to start in November in New York.