'Love Boat' Star Marriage Capsizes

6/26/2014 8:30 AM PDT

'Love Boat' Star -- Marriage Capsizes ... Divorce Looms


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.