Aisling Clíodhnadh O'Sullivan (born 16 March 1984), known professionally as Aisling Bea (/ˈæʃlɪŋ ˈbiː/ ASH-ling BEE), is an Irish comedian, actor and writer. She created, wrote and starred in the comedy series This Way Up on Channel 4. As a stand-up comedian, she won the "So You Think You're Funny?" award at the Edinburgh Fringe Festival in 2012, being only the second woman to win the award in its then twenty-five year history. She also regularly appears on light entertainment comedy panel shows such as QI and 8 Out of 10 Cats.
Bea was born in Kildare, Ireland. Her father, Brian, was a horse veterinarian who died by suicide when Bea was three years old; she was not told how he had died until she was 13. She adopted the stage surname "Bea" as a tribute to her father, taking it from a short form of his first name. Bea and her younger sister, Sinéad, were raised by their mother, Helen (née Moloney), a secondary school teacher who had previously trained jockeys at the Racing Academy and Centre of Education and was herself a professional jockey. Her family was "obsessed" with horses and race meetings. In her youth, Bea worked as a tour guide at the Irish National Stud, but knew from a young age that she was not interested in the horse racing industry and instead loved performing. Her great-aunt was playwright Siobhán Ní Shúilleabháin, and musician Liam O'Flynn was a family friend.
Bea was educated at Presentation Secondary School, Kildare Town, a Catholic school, and studied French and philosophy at Trinity College Dublin. While there, she was part of a student sketch comedy group. She then studied at the London Academy of Music and Dramatic Art (LAMDA).