Regina Spektor gives birth to baby boy

Grammy nominated singer-songwriter and new mum Regina Spektor has taken to Facebook to announce the birth of her baby son.

Grammy nominated singer-songwriter Regina Spektor has announced the birth of her baby son. (AAP)

US singer-songwriter Regina Spektor is a new mum.

Spektor announced the happy news on her Facebook page on Tuesday, but didn't reveal when her baby boy was born.

"I wanted to let you know that Jack (Dishel) and I have been happily hanging out with our new little son and that all is going great" she wrote.

Jack Dishel is also a singer-songwriter.

New York-based Spektor's pregnancy news was leaked in February when she was a no-show at the Grammy Awards, despite being nominated for her Orange is the New Black TV theme song You've Got Time.

Reports suggested she was too pregnant to fly to Los Angeles for the ceremony.

Spektor is best known for her hit Fidelity.