John Lennon, Yoko Ono's son Sean welcomes 1st child with Charlotte Kemp Muhl

John Lennon and Yoko Ono’s only son has become a father.

On Tuesday, August 1, Sean Ono-Lenon, 50, and his longtime partner Charlotte Kemp Muhl, 39, announced the birth of their son, Aurelius, though they did not reveal the little one’s date of birth.

“@charlottekempmuhl and I have created a Human Bean!” Sean wrote on Instagram as he revealed the baby’s name. He also shared a heartwarming picture of the new parents holding their little bundle of joy.

Sean further shared a stunning shot of Charlotte holding her newborn son on her chest in the hospital bed. “Baby Momma!” he proudly captioned the picture.

Meanwhile, the musician-slash-model — who simply goes by Kemp Muhl professionally — reflected on motherhood in her own Instagram post, writing,” We made a human! Am convinced DNA is agentic alien quaternary code. The sleep deprivation only adds to the surrealism… Burping technique tips welcome.”

The new mom revealed that she has been playing Aurelius music by British electronic musician Aphex Twin and Russian composer Stravinsky.

Sean’s older half-brother, Julian, also celebrated the news on Instagram with four heart emojis, to which Sean responded, “Uncle Jules!”

Julian was born to the Beatles star and his ex-wife Cynthia in 1963.

Meanwhile, Sean was born just five years before John Lennon’s 1980 murder.

Sean and Charlotte met at Coachella in 2005 and began dating in 2007, and the pair have worked on many music projects together.