Taylor Swift ruins her ex's wedding in her brand new music video directed by Blake Lively

Taylor Swift crashes an ex-boyfriend's wedding in the music video for her brand new song I Bet You Think About Me.

The surprise video - which was only announced yesterday - was the directorial debut for Taylor's good friend and actress, Blake Lively.

The video also stars actor Miles Teller as Taylor's ex-boyfriend and the groom at the wedding Taylor proceeds to ruin, but smashing the red velvet wedding cake, giving a drunken speech and eventually turning everything red.

The song - which is a collaboration with Chris Stapleton - features on Taylor's recently released re-recording of her album Red.

About working with Blake - who is married to Ryan Reynolds - Taylor said:

"I finally got to work with the brilliant, brave, & wickedly funny Blake Lively on her directorial debut."

"Blake smashed it, just like I smashed [the wedding] cake," she added later.

We can't wait to see what else Taylor Swift has planned for her fans!