John Travolta posted on social media to thank his child Ella Bléu Travolta

who walked the runway first time in this year's Karl Lagerfeld show at New York Fashion Week.

Sharing a picture of the 22-year old strutting her clothes in an elegant black suit and a lingerie-inspired top

The Grease Star wrote "So proud of Ella's debut at fashion week in New York City!"

Ella posted the catwalk image and two black-and white behind-the-scenes images