You could argue that Eleanor Columbus wasn't even an actor when she made her first appearance in Harry Potter as Susan Bones. Very much a background character, she's only in the first two films and doesn't say a word, and as the daughter of Chris Columbus, who directed the movies, it's probably fair to assume she didn't have to work too hard to get the part.
She only has two credits to her name for films that weren't made by her father - and they came twenty years apart - so she may not consider acting to be her full-time career. She's definitely enjoying life though - her Instagram account shows us a confident young woman with a great sense of style (not everybody could pull off that hat look), and followers also get treated to the occasional celebrity guest appearance. Steven Tyler of Aerosmith is one of the more recent names who's been happy to pose with her.