Real-life singer/musician Rex Smith, not Garrett, plays the rocker.
Sooner or Later (1979 TV movie)
starring Rex Smith, Denise Miller (who does look like Valerie Bertinelli a bit), Barbara Feldon, Judd Hirsch, Lilia Skala, Morey Amsterdam, Vivian Blaine, Lynn Redgrave
starring Rex Smith, Denise Miller, Barbara Feldon, Judd Hirsch, Lilia Skala, Morey Amsterdam, Vivian Blaine, Lynn Redgrave,
When 13-year-old Jessie falls for 17-year-old musician Michael, there is a strong mutual attraction. In order to win him, she adopts an alternate life: pretends to go to a Catholic high school, pretends to be older, dissembles to her Jewish family. When the elaborate deception fails, Jessie tells Michael the truth. He's shocked, angry and hurt, and must decide whether to pursue her or not.
I found this summary at Netflix's site:
To attract the attention of 17-year-old rock 'n' roller Michael Skye (Rex Smith), 13-year-old Jessie Walters (Denise Miller) enlists the aid of a professional makeup artist who transforms her into a 16-year-old. How will Michael react when Jessie's web of lies is exposed? Judd Hirsch and Barbara Feldon also star in this likable made-for-TV drama about false appearances, teen fantasies and, ultimately, telling the truth.