Sendhil Ramamurthy has joined the cast of USA's 'Covert Affairs' opposite Piper Perabo. The 'Heroes' co-star will play a CIA agent in the series, about an inexperienced CIA field operative (Perabo) whose ex-boyfriend is of special interest to her boss. Ramamurthy was previously attached to NBC's 'Rex Is Not Your Lawyer.' [Hollywood Reporter]

More casting news after the jump.

(S02E24) "If you think we're bad, you should have seen our parents." - Gossip Girl about those who complain about today's youth

After weeks, if not months, of hearing about it, we finally saw what the Gossip Girl spin off could be like. Set in the 80s, the spin off would star Brittany Snow as a young Lily, Krysten Ritter as her sister Carol, and Andrew McCarthy as their father. The action would, as expected, follow Lily's life as a young woman trying to make sense of the world and find her place in it.

This past week, the Internet has been filled with reports that the potential spin off was dead even before this week's episode aired. Other reports claimed that there was still a chance for the spin off to be picked up and find its way on The CW's 2009-2010 schedule. How about we don't listen to those reports and make our own decision on if the network should give the spin off a chance?

May sweeps has officially arrived. For TV fans that means a full month of explosive season finales, jaw-dropping cliffhangers and -- best of all -- a long list of famous guest stars from both the big and small screens.

Among the A-listers you'll see this season: a daytime TV queen (Elisabeth Hasselbeck), a 'Star Trek' icon (Leonard Nimoy) and a two-time Oscar winner (Jodie Foster) who will finally let Maggie Simpson do the talking.

Check out our guest stars gallery to see when all of Hollywood's finest will be sweeping their way onto your favorite TV shows.

Timberlake to be Fallon's first guest, 'Grey's' lesbian doc gets a contract and more ...

Justin Timberlake will be Jimmy Fallon's first guest when the 'SNL' vet takes over the 'Late Night' hosting reins from Conan O'Brien this Monday. No word yet on whether they'll do an encore of their 'SNL' Bee Gees skit.

In other news, 'Grey's Anatomy's' newest lesbian doc, Jessica Capshaw, has signed on for the rest of this season (and possibly next); Brittany Snow has nabbed the lead in the 'Gossip Girl' spinoff; and 'CBS has renewed 'Survivor' for two more seasons (yes, it's still on).

See more of today's TV headlines, casting scoops and premiere dates after the jump.