Jennifer Lopez's children 'twin' in school uniform

Max and Emme have gone back to school!

Babies no more! Jennifer Lopez's twins started their first day of fourth grade on Thursday, 7 September, and the proud mum took to her Instagram to celebrate. "So proud of my babies…#notbabiesanymore #4thgrade #love," the 48-year-old captioned the picture of her nine-year-old son Max and daughter Emme twinning in their school blazers.

The two flashed identical smiles with Max wearing khaki pants, a white shirt and his school blazer, while his sister stood next to him sporting a pale blue skirt, knee-high socks, black Mary Jane shoes and the same jacket.

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Earlier this year, Jennifer, who shares her twins with ex-husband Marc Anthony, opened up about her two children and the impact they've had on her life. "They just make my life so much better. I'm forever grateful," she said during an appearance on the Today Show. "I didn't have kids until later. I almost thought that I wasn't going to happen for me. So I'm very aware that I was blessed with that and it could have been something different. So I don't take it for granted."