J.P. Shay in 'Dumb and Dumber' 'Memba Her?!

American star Karen Duffy was in her early 30s when she played the killer criminal J.P. Shay -- who is hunting down the briefcase filled with ransom money -- in the 1994 classic "Dumb and Dumber."

Karen Duffy was amongst a stellar cast including Jim Carrey as Lloyd Christmas, Jeff Daniels as Harry Dunne, Lauren Holly as Mary Swanson, and Mike Starr as J.P. Shay's gassy accomplice Joe Mentalino.