Need to know movie title please help!

Trying to get title for an older (possibly late ‘70’s) thriller movie. What I remember is main character was a rock or movie star. A teenage girl is infatuated with him and when he marries, she commits suicide. Her parents find her in bedroom then brick off the room with girl still in it. Star some how ends up renting room from the couple and when they discover who he is, they start to kill off his friends and ex wife before plotting to kill him. He eventually finds the girl’s remains in the wall. Can remember some other scenes but hopefully someone else saw this movie and can help me with the title. Please help.....my friends and co workers think I made this up! Thanks!!