The former Beverly Hills 90210 actor petitioned to end the marriage of nearly 18 years in Los Angeles Superior Court on Friday. She cited irreconcilable differences.

Spelling's petition says the two have been separated since June 17.

She is asking for sole physical custody and joint legal custody of their three sons and two daughters, whose ages range from seven to 17 years.

Physical custody determines with which parent the children primarily reside, while legal custody is who makes their major life decisions.

Spelling is asking the court to order McDermott to pay her spousal support and to pay for her divorce lawyer. No dollar amount was given.

The marriage was the subject of a reality show, originally titled Tori & Dean: Inn Love and later Tori & Dean: Home Sweet Hollywood, that ran on the Oxygen network in the US from 2007 to 2012.

Spelling, the 50-year-old daughter of the late TV magnate Aaron Spelling, starred alongside Luke Perry, Shannen Doherty and Jennie Garth in the original Beverly Hills 90210 from 1990 to 2000. She also appeared in the films Scary Movie 2 and The House of Yes.

McDermott, a 57-year-old Canadian actor, appeared on the Canadian TV series Due South and hosted the cooking competition show Chopped Canada.

It was the second marriage for both.

Australian Associated Press