Hank Baskett, Mason Disick, Faith Kidman Urban: Celeb Kids December Birthdays

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VIOLET AFFLECK

That a girl! Soon-to-be mom of three, Jennifer Garner can't keep her eyes off her beautiful daughter – who turned 6 on Dec. 1 – as the duo leave dance class in Beverly Hills, Calif., on Sept. 10.

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EVER MORISSETTE-TREADWAY

Look who's turning 1 on Dec. 25! Proud parents Mario Treadway and Alanis Morissette take their little man out for a sunny family stroll in Brentwood, Calif., on Oct. 31.

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KAI SCHREIBER

Hold tight! A 3-year-old (Dec. 13) Kai and dad Liev Schreiber stay in a New York state of mind while hailing a taxi in Manhattan on Oct. 15.

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HANK BASKETT IV

A smiling Kendra Wilkinson keeps her adorable soon-to-be 2-year-old (Dec. 11) close as the pair enjoy a family trip to the farmers' market in Santa Monica, Calif., on Nov. 19.

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THEODORE MACARTHUR

Ali Larter holds her soon-to-be 1-year-old baby boy (Dec. 20) close to the hip as the tight-knit pair hit the streets of Brentwood, Calif., on Nov. 2.

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FAITH KIDMAN URBAN

Isn't she lovely? Nicole Kidman keeps a firm hold on her buddle of joy – she turns 1 on Dec. 28 – while heading into Australia's Sydney Airport on July 6.

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MILO LANGDON

Liv Tyler and son Milo – he's turning 7 on Dec. 14 – make a picture-perfect duo on May 20, 2010, while shopping together in New York City.

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MASON DISICK

Say, hi! On Oct. 8, the always-dapper tot (he turns 2 on Dec. 14) enjoys some playtime with his expectant mom Kourtney Kardashian at a playground in Brooklyn, N.Y.

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LOUISIANA KIMMEL

Hold on, mom! Keeping her cool in shades, Leelee Sobieski gives her little cutie (who turns 3 on Dec. 16) a lift as they explore the streets of New York City on Sept. 5.

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ROBERT IRWIN

Look who's all grown up! The son of the late Crocodile Hunter Steve Irwin (who turned 9 on Dec. 1) celebrates his father's legacy with big sis Bindi, 14, at the annual Steve Irwin Day held at the Australia Zoo on Oct. 28.

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BENJAMIN BRADY

Gisele Bündchen's little man, who turns 1 on Dec. 8, stays warm in a cute dog print sweater in chilly New York on Nov. 19.

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BAYLEY WOLLAM

Almost five (Dec. 20), a smiling Bayley shares a special moment with mom Teri Polo at the premiere of Dolphin Tale in Westwood, Calif., on Sept 17.

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D'LILA & JESSIE COMBS

Hip-hop mogul Sean takes a break from his busy schedule to spend time with his darling twin girls (they turn 5 on Dec. 21) in Century City, Calif., on May 14.

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JOE MENDES

Taxi, please! A causal Kate Winslet makes hailing a cab a joint effort with her son (who turns 8 on Dec. 22) in New York on May 11.

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ZACHARY FURNISH-JOHN

Zachary, who turns one on Christmas Day, stays on trend wearing a cozy hat during a family outing with parents Elton John and David Furnish on Oct. 27 in N.Y.C.

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DOLLY & CHARLIE O'CONNELL

Rebecca Romijn and Jerry O'Connell's little fashionistas (who turn 4 on Dec. 28) show off their individual style while shopping for Halloween gear on Sept. 7 in Woodland Hills, Calif.