Secrets From Posh Spice's 'Ugly Betty' Closet

LOS ANGELES, Calif. (November 7, 2007) - On Thursday night, Victoria "Posh Spice" Beckham makes her "Ugly Betty debut, playing herself.

Posh plays the thunder-stealing Spice Girl at Wilhemenia Slater 's (Vanessa Williams) wedding party.

[ Victoria Beckham On 'Ugly Betty' - View the gallery ]

According to "Ugly Betty" costume designer Eduardo Castro, Posh arrived to the set solo - without an entourage, and brought Eduardo options from her own closet.

"A lot of the shoes were her own," Castro told Access Hollywood. "She had a lot of Jimmy Choos."

Posh brought much more than shoes though.

[ Beckhams Are Welcomed To LA - View the gallery ]

"She brought sunglasses, she brought a belt," he said. "We were both on the same page. It just worked really well."

[ Access Archives: Victoria Beckham - Watch the Video ]

Castro revealed he discovered the Spice Girl has a tiny mid-section.

"Her waist was around 23", which is very, very tiny," he said.

Vera Wang, who also makes a cameo, designed Victoria's skin-tight silver bridesmaid gown.

"It is just a really simple wrap and we added the little vintage pin," he said. "She just tried it on and that was it."

During the episode, after being shown up by Posh, Wilhelmina(Williams) demands she slip on a pair of flats and a dowdy dress. Posh however, even made that look good, putting her own spin on the frumpy replacement.

"I pull it in at the waist. I make it shorter. I put great accessories and great shoes and upstage her even more so she locks me in a cupboard," Posh revealed.