Probst, 50, and Russell, 40, have each been married once before and began dating last summer.
Probst reportedly ended his five-year marriage to psychotherapist Shelley Wright in 2001 while Russell has two children with actor Mark-Paul Gosselaar, whom she wed in 1996. Gosselaar filed for divorce in June 2010 and the pair finalized their split this past summer.
The finale of Survivor: South Pacific will air on Sunday, December 18 on CBS, while Probst's self-titled daytime talk show will premiere in the fall of next year.
CBS had announced it had inked a deal with Probst to develop his own show in June. The new one-hour show will cover topics ranging from daily news to people facing challenges and is not expected to interfere with Probst's Survivor hosting duties.
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