Copetti / Photofab / Rex USA 1 / 5
Copetti / Photofab / Rex USA 1 / 5

Josh Brolin has a new love interest in his life. The 46-year-old "Labor Day" actor was spotted kissing his assistant, Kathryn Boyd, while in Rome on Feb. 23. The twosome showed PDA as they walked around the Eternal City together, and source tells Us Weekly they're dating.

Brolin, wearing a brown leather jacket, jeans and dark sunglasses, walked with his arm around Boyd as they strolled the streets, snapping pictures along the way. Boyd wore a black jacket, skinny jeans, brown boots and big sunglasses for the outing.

PHOTOS: Unlikely celebrity couples

Showing some affection, the pair took a break and sat on steps while Brolin cuddled Boyd with his arms wrapped around her. The tourists were later seen studying a map before sharing a kiss on the lips and continuing their sightseeing.

A source tells Us that Brolin and Boyd, his assistant of nearly two years, first began dating back in March of last year.

PHOTOS: Hollywood's ugliest divorces

The "Gangster Squad" star filed for divorce from wife Diane Lane last February after eight years of marriage; the divorce was finalized in November 2013. That same month, Us Weekly exclusively reported that Brolin entered rehab for substance abuse problems. "He realized he needed help and is committed to his sobriety," an insider told Us at the time.

PHOTOS: 2013's biggest splits


Insured celeb body parts

Stars who are aging in reverse

Celebs who've removed romantic tattoos