Eric Nelsen is an Emmy and Tony award-winning American actor and producer. He is known for his role as Ennis in the Yellowstone prequel 1883. On stage, Nelsen portrayed Brett Sampson in the original Broadway production of 13, and he starred in The Good Mother. He has appeared in over 30 television series, including Hulu's revival of All My Children playing AJ Chandler, a recurring role in The Affair on Showtime, The Blacklist, Girls, The Following, NCIS, Blue Bloods, and iCarly.

Nelsen also appeared in the Universal Pictures film A Walk Among the Tombstones opposite Liam Neeson and in Coming Through the Rye opposite Academy award winner Chris Cooper. In 2018, Nelsen most recently won a Daytime Emmy award for Outstanding Supporting Actor in a Digital Daytime Drama Series for his work on the Amazon web series The Bay. As a producer, Nelsen has won three Daytime Emmys for The Bay and a Tony award for the Broadway play The Inheritance. He also produced the indie feature Wakefield starring Bryan Cranston and Jennifer Garner. At age 23, Nelsen became the youngest producer in history to win an Emmy award.