THAT'S His Girlfriend?!?

2/25/2008 2:50 PM PST BY TMZ STAFF
Rehab-relapser Danny Bonaduce was trollin' strollin' in Hollywood on Friday night and was out with a woman young enough to be his daughter -- except she wasn't.

Meet Bonaduce's rebound galpal, Sara Rue Amy Railsback. The pair met in a Starbucks ten months ago. Keep this in mind: Danny's new girl was born eight years after the final episode of "The Partridge Family" aired in March 1974.