Tina Fey as Liz Lemon in "30 Rock" (Credit: NBC)

Tina Fey as Liz Lemon in "30 Rock" on NBC.

Photos: NBC's '30 Rock'

Check out the cast of "30 Rock" on NBC.

A photo from the NBC show "30 Rock's."
(Credit: None )

A photo from the NBC show "30 Rock's."

An NBC photo featuring the cast of the
(Credit: NBC)

An NBC photo featuring the cast of the show "30 Rock."

Jack Donaghy (Alec Baldwin) tells Liz Lemon (Tina

Jack Donaghy (Alec Baldwin) tells Liz Lemon (Tina Fey) about his vacation on the season premiere of NBC's "30 Rock," premiering Sept. 23.

An undated NBC photo of "30 Rock" star
(Credit: NBC)

An undated NBC photo of "30 Rock" star Alec Baldwin.

Season Preview: 30 Rock

Season Preview: 30 Rock

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The cast of "30 Rock" accepts the award
(Credit: AP)

The cast of "30 Rock" accepts the award for best comedy.

Tina Fey as Liz Lemon in "30 Rock"
(Credit: NBC)

Tina Fey as Liz Lemon in "30 Rock" on NBC.

Actor Alec Baldwin, from the TV show "30
(Credit: AFP / Getty Images)

Actor Alec Baldwin, from the TV show "30 Rock," holds the Best Actor in a Comedy award in the press room during the 2009 Emmy Awards at the Nokia Theater in Los Angeles on Sept. 20, 2009.

Outstanding Comedy Series nominee: "30 Rock" on NBC.
(Credit: NBC, 2009)

Outstanding Comedy Series nominee: "30 Rock" on NBC. Pictured, from left, Alec Baldwin as Jack Donaghy and Alan Alda as Milton.

Outstanding Supporting Actor in a Comedy Series: Jack
(Credit: NBC, 2008)

Outstanding Supporting Actor in a Comedy Series: Jack McBrayer, as Kenneth Parcell, on "30 Rock" on NBC

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Tracy Morgan has been nominated for the outstanding
(Credit: NBC, 2009)

Tracy Morgan has been nominated for the outstanding supporting actor in a comedy series Emmy. Morgan stars as Tracy Jordan on "30 Rock" on NBC

Tina Fey as Liz Lemon in "30 Rock"
(Credit: NBC Universal, Inc.)

Tina Fey as Liz Lemon in "30 Rock"

The cast from the Emmy-award winning comedy "30
(Credit: NBC Universal Inc.)

The cast from the Emmy-award winning comedy "30 Rock." From left: Tracy Morgan, Alec Baldwin, Tina Fey, Jane Krakowski and Jack McBrayer.

"Believe in the Stars" Episode 302 -- Pictured:
(Credit: NBC Universal, Inc.)

"Believe in the Stars" Episode 302 -- Pictured: Tina Fey as Liz Lemon in "30 Rock"

"Do-over" Episode 301 -- From left: Tina Fey
(Credit: NBC Universal, Inc.)

"Do-over" Episode 301 -- From left: Tina Fey as Liz Lemon, Megan Mullally as Bev in "30 Rock"

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"Believe in the Stars" Episode 302 -- Pictured:
(Credit: Nicole Rivelli, © NBC Universal, Inc.)

"Believe in the Stars" Episode 302 -- Pictured: Tina Fey as Liz Lemon in "30 Rock."

"Do-over" Episode 301 -- From left: Tina Fey
(Credit: NBC Universal, Inc.)

"Do-over" Episode 301 -- From left: Tina Fey as Liz Lemon, Megan Mullally as Bev in "30 Rock."