Yes. The overly urban Frankie Avalon as Smitty in "The Alamo" was so misplaced that it was entertaining in a comedic way. Of course, it was still very painful to watch.
Teen heartthrobs in that time period being put into movies were horrid.
I love his music, but check out the wooden acting of Ricky Nelson in Wackiest Ship in the Army.
Or Tab Hunter in Damn Yankees. Both movies I love.