Get out your birthday cake Enrique Iglesias and Anna Kournikova‘s twins Lucy Nicholas just turned four.

The former tennis player celebrated the major milestone by sharing adorable snapshots of her kids to Instagram on Dec. 16 captioning them, “4!” Lucy was seen enjoying her playset outside and making arts and crafts. Nicholas was seated in a Spider-Man beanbag and smiling at the camera. 

Nicholas and Lucy are not the only parents. Kournikova (40) and Iglesias (46) have a 22-month old daughter. Mary, whom they also call Masha. Kournikova shared an Instagram video showing the three kids riding in a toy vehicle with Iglesias’ “Chasing the Sun” in the background.

The singer and athlete prefer not to reveal details about their personal lives, but they give fans glimpses through social media and interviews.