Ross Partridge is a staple on TV and starred in a few episodes of Netflix's Stranger Things as Will (Noah Schnapp) and Jonathan Byers's (Charlie Heaton) father Lonnie Byers. Partridge is also known for playing Don Midleton on Daisy Jones & The Six, Tom McKinnon on Billions, and David Lamb in the 2015 horror movie The Lamb. There is quite the mystery surrounding Joyce Byers's (Winona Ryder) ex-husband Lonnie. Since he hasn't been a part of his children's lives in years, viewers want to know more about him.