Ashley Olsen and National Treasure actor Justin Bartha have gone public with their budding romance after attending a film screening in New York together on Monday.

The new couple stepped out for the Cinema Society screening of Trumbo - a movie about blacklisted Hollywood screenwriter Dalton Trumbo.

A source tells the New York Post's gossip column Page Six, "They huddled close together most of the night."

Olsen and Bartha later went on to party at Tribeca Cinemas.

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(This news article provided by World Entertainment News Network)