Performing on Britain's Got Talent's First Live Semi-Final Tonight...

Join Simon Cowell, Amanda Holden, Alesha Dixon and David Walliams for the first live semi-final tonight on ITV at 7.30-9pm. Results Show at 9.30pm

Performing on Monday night are:

Becky O'Brien - Mitch and Cally - Henry Gallagher - Cor Glenaethwy Choir - Entity Allstars - Ruby Red Performers - Billy and Emily England - Lorraine Bowen - Andrew Fleming.

Guest performer tonight - Ricky Martin

The guest performers line up for the week are here.

All 45 Semi-Finalist Listings

#Britain39sGotTalent #SimonCowell