Daphne de Beistegui is an actress who portrayed Lily Luna Potter in Harry Potter and the Deathly Hallows: Part 2.
According to Will Dunn (James Potter II), Daphne followed Daniel Radcliffe through the set always hugging him - even when they were not filming, she would be hugging him.
Daniel mentioned in an interview that Daphne seemed to adopt him as a second father, always hanging onto him, but he said he didn't really mind. He claims she was really adorable.