Michelle Trachtenberg and Melora Hardin have joined New Line's Zac Efron teen comedy "17" reports Reuters.

The Jason Filardi-penned script follows a middle-age father (Matthew Perry) who wakes up to find he's 17 again (Efron). In order to be close to his children, he enrolls in the same school as they attend.

Leslie Mann plays his wife, Trachtenberg his daughter who doesn't know that the boy she is crushing on is her father, and Hardin is the principal at the school.

Burr Steers is directing and production begins this month.