Robert Pattinson and Kristen Stewart praised their "amazing" on-screen daughter at the 'Twilight Saga: Breaking Dawn - Part Two' London premiere last night. The pair, who play married vampire couple Edward and Bella Cullen in the franchise, had nothing but good words to say about 12-year-old Mackenzie Foy - who plays Renesmee in the final instalment. Speaking on the red carpet outside the Odeon cinema in Leicester Square, Kristen, 22, told BANG Showbiz: "[Mackenzie's] like one of the coolest kids I've ever met. She use to always be like, 'I want to be a movie director!' "I think every single member of the cast was like, 'Cool! Call me for a job because I will work for you'. She's amazing." Robert's comment echoed his real-life girlfriend Kristen's, adding that working with Mackenzie made the filming "spontaneous". He said: "I like working with kids - it's really easy. Kids do all the work for you! Everyone's got their focus on the baby and Mackenzie. "Mackenzie's a great actress. It just makes it really easy, everything's spontaneous."