Rosalind Ross

Mel Gibson was snapped in the middle of some PDA with a babe in Rome ... but TMZ has learned he's back in the U.S. -- and very single -- having just wrapped on a massive project. Here's the deal ... the actor-director star and the Italian celeb Antonella Salvucci were snapped…

Mel Gibson and longtime partner Rosalind Ross have separated ... TMZ has learned. The split comes after 9 years and one child together. The two quietly uncoupled about a year ago ... TMZ has confirmed. People was first to report the breakup. The two began dating in 2014 after meeting through…