"Yipppeeeee! Amrita and Shakeel have another baby boy!!! He's too cute! Congrats," Arbaaz, who is married to Amrita's elder sister Malaika, tweeted Saturday.
Malaika confirmed the news to IANS through SMS, saying: "Yes, she has been blessed with a baby boy."
She did not reveal any further details.
Amrita is married to businessman Shakeel Ladak, and they already have a son named Azaan, who was born in 2010.
Amrita was heavily pregnant, but didn't miss the celebrations of her best friend, actress Kareena Kapoor's wedding to Saif Ali Khan, earlier this week.
She was seen glowing during the pre-wedding celebrations Oct 14, as well as on the nikaah-cum-post wedding party Tuesday night.