Robert Pattinson's Sis Lizzy Auditioning For 'X Factor' Is the Most Exciting Thing For Him!

Robert Pattinson suits up while attending the premiere of his latest film Maps To The Stars during the 2014 Toronto International Film Festival held at Roy Thomson Hall on Tuesday (September 9) in Toronto, Canada.

The 28-year-old English actor was joined by his co-stars Julianne Moore, John Cusack, Sarah Gadon, and Olivia Williams.

PHOTOS: Check out the latest pics of Robert Pattinson

“I’ve actually never sung with her. We have really different taste in music so we always get into arguments, but like, her being on that is the most exciting thing to happen to me in such a long time. I’m SO excited about it. She’s really good,” Rob recently shared to ET Canada about his sister Lizzy auditioning for X Factor.

In case you missed it, check out Lizzy‘s audition on the hit show.

FYI: Julianne is wearing Giambattista Valli.

10+ pictures inside of Robert Pattinson and Julianne Moore at the Maps To The Stars premiere…