"Alex and Jennifer ran into each other about a month or so ago in L.A.," the source shared. "They're both single, have these huge careers and their families are their No. 1 priorities. They have a lot in common and friends thought they could be really good together."
The source also revealed that their relationship, while "very new," really kicked off when A-Rod went to go check out J.Lo's Las Vegas show, All I Have, at The AXIS at Planet Hollywood.
"Jen flew to Miami with her kids. She dropped them off there and she and Alex then took their first trip together to the Bahamas to get away," the source said, explaining that Lopez's 9-year-old twins, Emme and Maximilian, are staying with their father, Marc Anthony, at his house in Florida.