Radnor graduated from Bexley High School before enrolling at Kenyon College, where he studied in the theater department and received the Paul Newman Award. He also spent a semester training at the National Theater Institute at the Eugene O’Neill Theater Center in Waterford, Connecticut. In 1996, he earned a Bachelor of Arts in Drama. He later received his Master of Fine Arts degree in Acting from New York University’s Tisch School of the Arts in 1999. In 1997, he participated in the Livnot U’Lehibanot Israel experience program in Tzfat, further exploring his cultural and spiritual roots.

Breakthrough with “How I Met Your Mother”

Radnor rose to fame for his role as Ted Mosby on the CBS sitcom How I Met Your Mother, which aired from 2005 to 2014. The series, known for its critical and commercial success, became a cultural phenomenon and earned several awards during its run, including an Emmy. Radnor's portrayal of the hopeless romantic Ted earned him widespread recognition and established his place in the entertainment industry.

Directing and Writing Career

In 2010, Radnor made his directorial and writing debut with the comedy-drama film Happythankyoumoreplease. The film premiered at the Sundance Film Festival, where it received the Audience Award and was nominated for the Grand Jury Prize. Following this success, he wrote, directed, and starred in his second feature film, Liberal Arts, which also premiered at the 2012 Sundance Film Festival to positive reviews. Both films explore introspective themes and romantic complexities, aligning with Radnor’s narrative style.