One Direction star Louis Tomlinson has revealed that he has become a father. The singer announced on Twitter that Los-Angeles-based stylist Briana Jungwirth gave birth to a baby boy.

"I'm pleased to say my baby son was born yesterday :) He is healthy and pretty amazing :) I'm very happy!!" he wrote.

Although Tomlinson and Jungwirth are no longer together, they intend to co-parent the child. Tomlinson's girlfriend, Danielle Campbell, is apparently worried how the baby's birth will affect their relationship. A source told Hollywood Life: "Danielle has already warned Louis that she won't play second fiddle to Briana. Of course, she accepts that Louis has to be a father to the baby boy, but she doesn't want him to be spending too much time with Briana. She's told Louis that in no uncertain terms, and won't put up with Briana using a baby as leverage to get back into his life."

Meanwhile, Tomlinson's former girlfriend Eleanor Calder is happy for the singer. Another insider revealed: "Eleanor got the news from Louis directly. Of course she's happy for him. She knew how much Louis wanted to have a little boy. Eleanor does have mixed feelings, bittersweet feelings. She always imagined one day that she and Louis would be having a child together."

Tomlinson met Jungwirth in 2015 through mutual friends, after he split up with Calder. The two were also spotted on a number of dates in Hollywood before the baby news broke out.