John Travolta crashed a wedding to wish the love-up couple good luck.

The 59-year-old actor turned up to the young pair's nuptials in Georgia unexpectedly last week to wish them well after meeting them at a bar the day before.

The 'Grease' star - who recently donated his former plane to a GA museum - was in the state renewing his pilot license when he bumped into the couple, who revealed they were tying the knot the next day.

John was ''down-to-earth about the whole ordeal'', but stood out from the rest of the guests as he turned up at the bash dressed in a T-shirt and a baseball cap from the night before.

However, he didn't let it bother him as he stood and posed for photographs with the whole bridal party.

A friend of the groom was eager to let the rest of the world know about the surprise celebrity appearance and shared the photographs on Reddit along with the caption, ''My friend ran into John Travolta the night before his wedding, and he shows up the next day.''