Priestley's representative, Marla Farrell, didn't give any details.
The 39-year-old actor and his wife, Naomi Lowde-Priestley, have a daughter, Ava, who was born in July 2007.
Priestley played Brandon Walsh on the long-running '90s teen drama "Beverly Hills, 90210." His wife is a makeup artist.
The couple were married in 2005.
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