Jill Whelan -- who famously played Capt. Stubing's daughter Vicki on "The Love Boat" and Lisa (the sick girl) in "Airplane!" -- is getting divorced.
Jill filed legal docs -- obtained by TMZ -- citing irreconcilable differences. Jill -- now 47 -- and her husband, John Chaykowsky have an 8-year-old son. She wants full legal and physical custody.
Jill -- who has worked sporadically since her big roles -- also wants spousal support.
The couple married a decade ago.
BTW ... "Airplane!" -- best move ever.