The pair went to pal Joanna Garcia's wedding together Saturday, and C & A were caught getting quite romantic the night before as well...
Cam and A-Rod happily enjoyed a two-and-a-half-hour dinner at Prime 112 in Miami Friday night.
Diaz, in an attempt to be sneaky (not sure why, since she wasn't camera shy photographed here with Alex earlier in the day) ducked out of dinner five minutes before A-Rod. He later joined her and the two were whisked off into the night.
So maybe while Cameron was away in Spain, Stray-Rod was well behaved.
"He has actually been trying to be on good behavior," dishes a source close to the Yankees star about his womanizing ways.
OK, Cam isn't it time to move on? You can do so much better! Sorry, but good sex can only keep people together so long. This relaysh isn't gonna be it for either good-lookin' babe, then again who says it has to be?
Elsewhere, fellow Miami resident Matt Damon was spotted mingling with tons of girls outside of Chicago recently.
The DILF is filming his latest flick Contagion in Evanston, Illinois, on the campus of Northwestern University. Students there tell us Matt was "a stud and a half."
"He went over to the gaggle of students who were watching and wished everybody luck on their finals," dishes an eager onlooker.
"He took pictures with everyone and thanked us for letting him interrupt our finals week for his movie."
Love that Damon (who actually is a standup guy) mingles with the fans! However, as good looking as Matt is in his au natural way, our star-struck student had this to say:
"His hair is majorly graying, and it def didn't look like it was make-up for the movie."
Back in L.A., Kate Beckinsale and Len Wiseman were spotted happy per usual in the audience watching a staged reading of The Graduate with Matthew Rhys and Kathleen Turner.
"Kate is simply stunning," an eyewitness tells E! adding that the performance was fantastic, as well.
"Kathleen still has that deep, remarkably, sexy voice!"
—Additional Reporting by Marc Snetiker and Aly Weisman