Tolman has two older brothers and a younger sister. Her family moved to England when she was a few months old and stayed until she was four years old. She spent the next five years in Oklahoma and West Texas, before moving to Sugar Land, Texas. She started taking acting classes when she was 10 years old at the Fort Bend Community Theatre. She attended Clements High School, graduating in 2000.[2]
She graduated from Baylor University with a Bachelor of Fine Arts in theatrical performance. After college, she moved to Dallas, where she was one of the founding members of Second Thought Theatre.[3]
The same year, it was also announced Tolman would have a two-episode guest role on The Mindy Project as Abby Berman, a romance novelist.[7] In 2015, she had a supporting role in Michael Dougherty's comedy horror film Krampus.[8]
Following her breakout role on Fargo, Tolman declined several supporting parts as mothers, wives and best friends, looking for a more unusual role.[6] In 2017, Tolman starred in ABC's Downward Dog, based on the Animal Media Group web series, It was canceled after one season.[9]
She starred in the ABC drama series Emergence, which premiered on September 24, 2019, and was cancelled after one season on May 21, 2020. She also guest starred in NBC's Good Girls.[10]