Complex sentence: Tom Cullen (born 17 July 1985) is a Welsh actor, writer and director, best known for his role in the award-winning independent film "Weekend" (2011) and as Viscount Gillingham in the television series "Downton Abbey".
Split into simpler sentences: Tom Cullen (born 17 July 1985) is a Welsh actor, writer and director. He is perhaps best known for his role in the award-winning independent film "Weekend" (2011) and as Viscount Gillingham in the television series "Downton Abbey".