In what appears to be one of the grandest LFW shows ever, the designer revealed his dazzling new range for the first time - a stunning series of sequinned, feathered and cut-out dresses - at the church-like venue, One Mayfair.
Macdonald also made another exciting debut - the news he will be designing a newborn clothing collection for Mothercare called 'SMILE by Julien' (could this be why he sent come cute kids down the runway?).
But, back to the catwalk. Feast your eyes on what looks set to be the red carpet-wear of choice this year and prepare for some serious party dress goals.
Want to see more? Check out every single look from the show in our gallery below: