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Marc Anthony, Chloe Green

Jason Merritt/FilmMagic

Disneyland really is the happiest place on earth, especially for Marc Anthony!

Jennifer Lopez's ex took his much younger girlfriend, Chloe Green, and his twins, Max and Emme, to the Anaheim, Calif., theme park Wednesday. And E! News has exclusively learned that the duo has been quietly dating for one month.

The 44-year-old Latin crooner and the 21-year-old (!) Topshop heiress held hands as they walked through the park. The May-December duo was spotted being affectionate with one another, but both also took the time to engage with Marc and J.Lo's 5-year-old twins.

Up until last month, Marc had been getting cozy with 24-year-old Venezuelan model Shannon de Lima, but the pair has since broken up.

Anthony and his ex-wife remain on friendly terms, having earlier this month gathered together with Lopez and her much younger beau Casper Smart (and Anthony's ex de Lima, too!) for a birthday party.

Glad to see everyone getting along so well.