Talk about one big happy - extended - family!

Jennifer Lopez and current beau Casper Smart got together with her ex-husband Marc Anthony to celebrate his son Christian's 12th birthday, and even though they are no longer a couple, the former Hollywood power pair seem intent on staying in each other's lives!

Anthony was joined by on-again girlfriend Shannon de Lima, but Christian's biological mother Dayanara Torres didn't make it to the soiree. Also in attendance were Jennifer and Marc's twins Max and Emme, plus their half brother Ryan, 9.

Although the Latino singer was said to be none too pleased about J.Lo's relationship with the back up dancer following their July 2011 separation, it would appear that new love heals all wounds because everyone was all smiles for the big day!