Ezra Miller sought advice from Emma Watson ahead of his role in 'Fantastic Beasts and Where To Find Them'.

Ezra Miller

Ezra Miller

The 24-year-old actor and singer was thrilled to find out he had been offered the part of Credence in the fantasy film but was left disappointed when he found out his pal Emma already knew.

Speaking on the blue carpet at the European premiere of 'Fantastic Beasts and Where To Find Them' in London's Leicester Square, he said: "Eddie Redmayne had stolen my thunder because he'd already talked [to Emma] because he was cast long ago and he told her I was already cast so she already knew. Outrageous!

"She was delighted; she knew what the books had meant to me as a young person so she could imagine how much joy I was feeling. She said wonderful things about Jo, about David [Yates] and about Eddie. She worked with Eddie on 'My Week With Marilyn'. She just told me to buckle my seatbelts on all of my limbs and digits and prepare for a fun ride. Keep my hands and feet inside the vehicle at all times."

Meanwhile, Ezra - who stars as The Flash in 'Justice League' - previously opened up about the similarities between the DC Comics and 'Harry Potter' fans.

He said: "I think there's a die hard level of devotion in both places and both of these stories are y'know, sort of modern mythologies that people really do use as a source of information and inspiration in the way they live their lives.

"It becomes a huge part of people's realities and I think it benefits people to have fantasy and stories like that, I think it's really good for us individually and collectively as a culture to have these stories we can all refer to.

"Like, you can be like 'You're really Umbridging me right now' and someone would be like 'Woah that's horrible, I'm so sorry.' We have a mutually-understood vernacular based on these stories we all know."