The Lord Of The Rings actor is spotted wherever he goes, but he never snubs fans, preferring to embrace their enthusiasm instead.
Lilly has now decided to model how she deals with her new found fame on Monaghan's example.
She says, "Dominic can't go anywhere without being recognised. I've experienced that a bit and seen his reaction.
"He sees it as these people are his supporters and he's so glad to have that support. So he's very cordial and I've got to see someone be very positive about it, because not everyone is like that."