"The Hangover Part III" star Justin Bartha is reportedly engaged to Lia Smith.
We can only speculate on what kind of "Hangover"-fueled tomfoolery his bachelor party might entail.
Bartha, 34, proposed at the Post Ranch Inn with an "unbelievable" engagement ring, the mag's sources said.
A rep for Bartha did not immediately respond to the Ministry's requests for comment.
Bartha and Smith met during a Pilates session at an L.A. gym where Smith works as an instructor. They debuted their romance this January while vacationing in Maui.
This would be the actor's first marriage. He was previously linked to actress-turned-designer Ashley Olsen for two years. They broke up in March 2011.
The third installment of the film's franchise hits theaters Thursday, with Bartha's costars Bradley Cooper, Ed Helms, Zach Galifianakis and Ken Jeong all returning for the bro-fueled high jinks.
Bartha can next soon be seen playing Dead Boys singer Stiv Bators in "CBGB."
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