Their son, Aurelius, is the late John Lennon’s first grandchild.

The couple also revealed which two artists they have already introduced to the Beatles legend’s first grandchild.

The 50-year-old musician shared the news on social media with photos of the family in coordinating black-and-white outfits.

John Lennon and Yoko Ono’s son Sean Lennon has welcomed his first child! The 50-year-old musician announced on social media ...

Sean Ono Lennon and Charlotte Kemp Muhl have welcomed their first child, a baby boy named Aurelius, marking a new chapter for ...

The couple announced the birth of their son Aurelius on Tuesday, Sept. 1 ...

Sean Ono Lennon and Charlotte Kemp Muhl welcomed their first child. Their newborn son has been named Aurelius, marking a new ...

The rockstar couple have welcomed their first baby ...

Sean Ono Lennon and girlfriend Charlotte Kemp Muhl have announced the birth of their baby boy.

John Lennon’s first grandchild has been born. Sean Ono Lennon, the son of the Beatles musician and Yoko Ono, announced the ...

John Lennon’s son Sean Ono Lennon announced that he and partner Charlotte Kemp Muhl welcomed a baby boy in a social media ...