Source: E! Online

Matt Damon seems to be in a rush to catch up to his newlywed crony, Ben Affleck.

The Talented Mr. Ripley star is taking his relationship with girlfriend Luciana Barroso, 29, to the next level, after popping the question to the Argentine-born beauty shortly before Labor Day weekend, E! has confirmed.

While Affleck is currently expecting his first child with wife Jennifer Garner, Damon will take on stepfather duties to Barroso’s 6-year-old daughter from a previous relationship.

It will be the first marriage for the 34-year-old actor. No wedding date has been set.

Damon and Barroso, a former bartender who now works as an interior designer, have been together for two years.

The 29-year-old brunette was at Damon’s side throughout the European shoot of 2004′s Ocean’s Twelve and has accompanied him home to Boston to meet his family and friends and keep him company on the set of his upcoming film, The Departed.

Damon was previously linked with Winona Ryder (whom he famously dumped during an Oprah appearance), Claire Danes, Minnie Driver and Affleck’s former assistant, Odessa Whitmore.

Apart from planning his forthcoming nuptials, Damon has a full slate ahead of him.

He’ll next be seen opposite George Clooney in the upcoming drama, Syriana, a first-person account of life inside the CIA. The film is set for release on Nov. 23.

Sticking to the same theme, Damon will also appear in the film The Good Shepherd, a 40-year-history of the CIA, told through the eyes of one of its founding officers. Angelina Jolie and Robert De Niro also star in the film, which is set for a Dec. 22, 2006 release.

Damon is also set to star in a recently-announced third Bourne film–The Bourne Ultimatum. The movie is targeted for a 2007 release.