Finalist on season 10 of ABC's reality dating show The Bachelorette who became the star on the 21st season of The Bachelor in 2017. He is also popular on Instagram, with over 1.1 million followers on his nickviall account.
He earned a bachelor's degree in business administration from the University of Wisconsin-Milwaukee in 2004.
Before appearing on The Bachelorette, he was previously engaged.
He was born in Milwaukee, Wisconsin to parents Christopher Viall and Mary Viall. He grew up with siblings Jessica, James, Bella, Luke, Sarah, Teressa, Maria, Samuel, Olivia, and Peter Viall. He became engaged to the winner of season 21 of The Bachelor, Vanessa Grimaldi; however, they called it quits in August 2017.
He competed for Andi Dorfman's heart on The Bachelorette.