Dominic Cooper has joined the cast of Captain America: The First Avenger, Marvel Studios announced on Tuesday.

The hunky star, who appeared alongside real-life girlfriend Amanda Seyfried in the 2008 movie musical Mamma Mia!, joins the eagerly-awaited superhero blockbuster in the role of young Howard Stark, father of Iron Man hero Tony Stark.

Captain America: The First Avenger will hit heaters on July 22, 2011.

The film will follow Steve Rogers, who participates in a program that ends up turning him into Captain America. In addition o Dominic, the feature also stars Tommy Lee Jones, Hugo Weaving, Hayley Atwell, Sebastian Stan, Stanley Tucci, and Fantastic Four star Chris Evans as Rogers.

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