Thes One (born Christopher Cesar Portugal in Torrance, California, on October 18th, 1977) is one half of the hip hop duo People Under the Stairs. He has produced and engineered 7 albums for People Under the Stairs.

His musical aliases include Uncle Thester, Supreme One, Thessoterrorist, Thunder Thumbs, Baron Wolfgang Von Thes, The S One and Lord RadioPeople Under the Stairs (or P.U.T.S.) are one of underground hip hop scene's acts.

An MC and producer, Thes One is recognized for his eclectic and diverse range of beats. He handled the majority of the production in People Under the Stairs' albums, although Thes One's partner Double K is a producer, MC and DJ also.

Thes One has produced a broad range of tracks for a number of artists as well as remixing many tracks too, one such notable remix is Pete Rock and CL Smooth's Back On The Block. Artists which Thes One has produced for include; Giant Panda, Ugly Duckling, J-Live, Starving Artists Crew, Crown City Rockers, Black Love Crew, Raw Produce, Substance Abuse, Lexicon, Akbar, Scarub and MURS.

In 2004, Thes collaborated with Giant Panda to create the Bloquera EP.In March 2007, Thes One released his debut solo album Lifestyle Marketing. It is a 2-disc album of instrumentals made from Herb Pilhofer's Music That Works, a demonstration album originally released in the early 1970s that showcased Pilhofer's musical compositions for radio & TV commercials, industrial films, and other projects.

The first disc is Thes One's album, the second consists of some of the original tracks from Music That Works from which Thes One's album was made. The first single off the album is the 10" release 'Target' b/w 'Grain Belt Beer'.