Jennifer Garner Declines Dallas Role when Jennifer Lopez Joins Cast  6/2/06

Jennifer Garner reportedly turned down the role of Pamela Ewing in the forthcoming Dallas movie after discovering her husband Ben Affleck's ex-fiancée Jennifer Lopez had signed to star in the remake.

The Alias beauty started dating her Daredevil co-star in July 2004 - seven months after the actor ended his high-profile engagement with J.Lo.

British newspaper the Daily Mail claims Garner was in talks to play Bobby Ewing's wife Pam, but backed out when she realized Lopez would be playing JR's alcoholic wife Sue-Ellen.

A source says "Jennifer Garner was really keen to be in Dallas, but I think she felt there would be a bit of a strain between them on the set and that could have led to awkward situations.

"Both are totally professional, but there might have been a certain 'atmosphere' and Jennifer Garner didn't need to go there."