Louis Tomlinson & Ex Briana Jungwirth Celebrate Son Freddie’s 1st Birthday Together

Happy birthday, Freddie!

Louis Tomlinson reunited with ex Briana Jungwirth to celebrate their son’s first birthday. In a video posted on her Instagram page Saturday, the British One Direction singer grins as he helps the little boy stand while his mom presents him with a white frosted cake bearing the child’s photo and the words “Happy birthday Freddie.”

“Special first birthday :),” Jungwirth wrote.

“Had a special day today with my birthday boy. Thanks for all the lovely messages!” Tomlinson tweeted.

The three were joined by at least two other…