BIRTHDAY STYLE: MARISKA HARGITAY AND TIFFANI THIESSEN

Actresses Mariska Hargitay and Tiffani Thiessen are celebrating their birthdays today.

Mariska Hargitay is best known for her role on the long-running NBC series, "Law and Order: Special Victims Unit".

Mariska turns 44 today.

Tiffani Thiessen who dropped the "Amber" from her name professionally is known for her roles on the teen series, "Saved By The Bell" and the Aaron Spelling-produced drama, "Beverly Hills, 90210".

Tiffani Thiessen turns 34 today.

credit: USA Today, photos: wireimage.com

WHO WORE ZAC POSEN BETTER?

Last month, Mariska Hargitay of "Law & Order: SVU" wore this blue satin Zac Posen to the 2007 Safe Horizon Annual Benefit Gala.

Four months prior, actress Julia Stiles rock the same midnight blue Zac Posen look with a pair of Jimmy Choo heels at the London premiere of her film, "The Bourne Ultimatum".

Mariska Hargitay and Julia Stiles in Zac Posen: who got IT?

Opinion Polls & Market Research

Style Verdict: Julia went for bare legs while Mariska covered up in black hose. Hmmmm... a draw maybe? Julia and Mariska both own this look in that Zac Posen dress.

Photos: wireimage

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