In the 1990s, he was well-known for playing Josh Blair on the NBC sitcom Veronica's Closet (1997–2000), which was a Top 10 hit in its first couple of seasons.

[5] Formerly billed as Wally Ward, Langham got his start in the John Hughes film Weird Science (1985), as well as in The Invisible Kid and the ABC Afterschool Special entitled Just a Regular Kid: An AIDS Story, but later moved to roles as a young bigot in Soul Man and as a gang leader in The Chocolate War.

He appeared in the Eddie Murphy comedy Daddy Day Care, and the critically acclaimed Little Miss Sunshine and The Social Network.

Langham dropped the Ward moniker in the 1990s as he moved to more adult roles, appearing as a regular in the much-hyped but short-lived CBS series WIOU.

He has guest-starred on many series including, Murphy Brown, NewsRadio, ER, Murder, She Wrote, Sex and the City, 21 Jump Street, Medium, both the 1985 and the 2002 versions of The Twilight Zone, The Outer Limits, Star Trek: Voyager, Curb Your Enthusiasm, Monk, Shameless, and Grace Under Fire.