After celebrating her 22nd birthday weekend down in Tennessee at Bonnarroo with Mary-Kate, Ashley Olsen was back in New York last night finally spotted with her boyfriend. The pint-sized mogul and the guy she's been rumored to be seeing for a while, Justin Bartha (from the National Treasure movies), arrived at a screening of Trumbo in Tribeca together, but still walked the red carpet separately not ready to really show off just yet. Hopefully there's nothing to the rumors about his temper because Ashley seems so happy with her new man. At least he doesn't have to worry about buying her expensive jewelry, since she can just design it herself.

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