How many movies have Gemma Arterton and Talulah Riley acted in together?

They have worked on 3 movies together! Their first movie together was St. Trinian's (2007) while their highest rated movie together was The Boat That Rocked (2009). They have not worked together since St Trinian's 2: The Legend of Fritton's Gold (2009). They are most known for their comedy films together.