Former TOWIE star Mark and his sister Jessica, who still stars in the ITV2 reality show, have popped on their best clothes for the showbiz event and look super glam.
The musical is based on The X Factor and Simon Cowell and Louis Walsh are both expected to be on the red carpet, along with a whole host of other stars.
Although Cheryl Cole has tweeted that she "can't make it", Simon's Britain's Got Talent judges - Amanda Holden, Alesha Dixon and David Walliams - are all thought to be attending.
While travelling to the event, which will be held at the London Palladium, Jessica and Mark posed for a selfie together in the car.
Posting the picture on Twitter, Jessica said: "On the way to #icantsing musical with @MarkWright_ #music #xfactor."
Unfortunately, Mark's fiancée Michelle Keegan can't be there due to her Coronation Street filming commitments in Manchester.
However, he has the perfect companion in his sister and Michelle has already made plans for tonight.
Referring to Mark's own reality series, Michelle tweeted: "Can't wait for Party Wright Around the World tonight! I have no idea how @MarkWright_ coped with living in the Bronx! Hahaha!"
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