'Life Unexpected,' 'One Tree Hill,' 'Smallville': News from The CW upfront

The good news for fans of "One Tree Hill" and "Life Unexpected" is that both series will be on The CW in the fall. The (potentially) bad news is that at the moment, they aren't guaranteed full seasons.

"We don't know if they're going to come back yet for 22 episodes each," CW Entertainment president Dawn Ostroff said Thursday (May 20) at the network's upfront. "They may. We haven't really talked about exact numbers yet."

Ostroff also says that each show will likely start off with a 13-episode order, and additional shows will be determined by how well they perform (they're paired up on Tuesday nights in the fall). The CW will likely be ordering more shows for midseason as well -- so far the only midseason pickup is a reality show called "Shedding for the Wedding" -- and will need to find spots for them, which would mean benching some shows for a while.

Nonetheless, Ostroff says "OTH" and "Lux" will "probably" end up with 22-episode orders. "Our main concern was getting them on together in the fall," she says. "Then we'll also have some midseason [shows] behind it."

Sophia Bush, who shot a pilot for ABC this spring (it wasn't picked up), will be returning to "One Tree Hill," Ostroff says.

- Allison Mack is no longer a regular cast member on "Smallville," but she's not exactly going anywhere either.

Mack, who was the subject of a fan-created and -paid for tribute ad on L.A.'s CW affiliate earlier this month, will be playing Chloe Sullivan in "multiple episodes" of "Smallville's" final season, Ostroff says. "I don't know if we've figured out how many, but she's going to be back for a lot of episodes. So I don't know if you're going to really feel like she's not [a regular] -- hopefully you won't."

Since 2010-11 will mark the end of "Smallville," fans can also expect some other familiar faces to return. Ostroff wouldn't drop any names, but she does say that the season will feature "a lot of interesting guest casting." (Hear star Tom Welling's thoughts on Season 10.)

Follow Zap2it and Zap2itRick on Twitter and Zap2it on Facebook for the latest TV, movie and celebrity news.

Photo credit: The CW