Teen Angel (1997)

High-school sophomore Marty dies after taking a bite of a six-month-old hamburger. His best friend Steve is thrilled when Marty returns to Earth as his guardian angel; however, Marty's guidance turns out to be less than heavenly. Steve's family includes: divorced mom Judy, a dental hygienist struggling to support her kids; 8-year-old sister Katie, who suspects weird things are going on with Steve, but nobody believes her; and Aunt Pam, Judy's acerbic sister, who works at the post office and also lives with the family.