'SNL' cast 'impressed by Justin Bieber'

Saturday Night Live cast members have reportedly praised Justin Bieber following his guest appearance on the show.

The 'Baby' star performed on last weekend's episode, as well as joining Tina Fey in a sketch about a teacher and her student.

Speaking to People, show star Bill Hader said: "He's a confident kid. That guy definitely doesn't hold back, which I was really impressed with. If I was as confident at that age, my life would've been a lot easier."

Co-star Kenan Thompson added: "He's a ball of energy. He's a cool young 16-year-old kid who is on top of the world."

Bieber also impressed head writer Seth Meyers, who described him as a "force of nature", and executive producer Lorne Michaels who branded him a "complete pro".

> Justin Bieber: 'SNL was incredible'