Antonia Thomas is an English actress. She made her acting debut in 2009 as Alisha Daniels in the British series Misfits. At the same time, she also starred in the made-for-television movie Stanley Park. She later had recurring roles in The Deep and Homefront. In 2012, she made her film debut in Homefront. This was followed by her performances in the movies Sunshine on Leith, Hello Carter, and Northern Soul. She then became known for her role as Evie in the British sitcom Lovesick. In 2017, she started playing Dr. Claire Brown in the US series The Good Doctor.