J.Lo, A-Rod Are Dating

They come with a ready-made "couple nickname," so it's kind of shocking it took them this long to get together: Jennifer Lopez and Alex Rodriguez, or "J-Rod," as Us calls them, are dating. Sources say they've been seeing each other for weeks, but "it's been really secretive." They've been together in LA and Miami, and the former New York Yankee has been to Vegas to see one of Lopez's shows.

Lopez, 47, most recently dated Drake; she has 9-year-old twins. Rodriguez, 41, currently a Fox Sports analyst, has 12- and 8-year-old daughters. But sources tell E! the relationship isn't serious: "Jennifer and Alex are both not looking for a relationship, just a good light-hearted time." Another source who spoke to People takes a slightly different angle: "[Rodriguez] has been around [Lopez's] family and she really likes that he is a dad. She is aware, though, that he is a ladies' man, too, and is being cautious." (More Jennifer Lopez stories.)