Jennie Garth Divorcing 'Twilight' Hunk

0313_jennie_garth_peter_fascinelli_getty_BNAnother celebrity marriage bites the dust ... this time "90210" star Jennie Garth and "Twilight" hunk Peter Facinelli are calling it quits after 11 years together.

The couple -- who have 3 minor daughters -- released a joint statement saying, "While we have decided to end our marriage, we both share the same deep love and devotion to our children."

The statement continues, "We remain dedicated to raising our beautiful daughters together."

We're told the couple has not filed divorce docs yet ... but it's just a matter of time.