United Kingdom, June 19 -- Sydney Sweeney has gushed over her boyfriend Scooter Braun, describing him as a "once in a lifetime" man.

The 28-year-old star took to social media to celebrate the record executive's 45th birthday, and she thanked Scooter for making her "smile again".

Sydney shared two pictures of herself and Scooter.

One featured the Euphoria star kissing the businessman on the cheek, and she wrote: "Happiest of birthdays to the man with the biggest heart I know [heart emoji]."

Sydney also posted a snap of herself and Scooter dancing together, and she added: "..thank you for all the living room dances and making me smile again. A good man is rare. A man like you is once in a lifetime (sic)"

Scooter - who has been dating S...