Jennifer Lopez on her growing twin babies

Jennifer Lopez has revealed her seven month old twins are really starting to develop their own personalities.

The singer, who ran her first ever triathlon on Sunday, gave birth to son Max and daughter Emme in February and she explained: “They are crawling and teething [at the moment].

“Emme is always very calm and quiet. Max is kinda very boy. He’s brawny and tough.

“He likes to scream and yell sometimes, and she’s kinda looking at him [like], ‘Hey, why are you screaming.’”

After completing the swimming, running and cycling race in Malibu at the weekend, Jennifer and husband Marc Anthony flew back to New York to celebrate his birthday with a 1940s Cuban-themed party at the Bowery Hotel. The family are now said to have departed for a holiday on a yacht around Italy and Greece.