The world rejoiced when news hit that actress Hayley Atwell was joining the Mission: Impossible franchise last week, but now the Captain America: The First Avenger star has confirmed that she’ll be in both upcoming Mission sequels. Paramount Pictures signed Rogue Nation and Fallout writer/director Christopher McQuarrie to return for both Mission: Impossible 7 and Mission: Impossible 8, to be shot back-to-back, so it was unclear if Atwell’s commitment would be for just one or both films. Luckily, Atwell took to Instagram to express her enthusiasm regarding the news, and confirmed that she’ll be …