Nicole Kidman spotted on the street in bold new $3000 look

The stars went out for a night on the town in Nashville on Sunday night, with A-Listers stepping out to celebrate Reese Witherspoon's 50th birthday.

Nicole Kidman was seen leaving the venue wearing a bold new look.

The Aussie actress, 58, wore a sheer black lace bustier top by McQueen which retails online for over $3000, paired with metallic silver leather pants.

Want the official inside scoop on MAFS, unfiltered and unseen? Watch After The Dinner Party here

Her blonde hair was pushed back and bounced behind her as she stopped to talk to fans on the sidewalk before slipping into her waiting car.

Also seen leaving the party was Mariska Hargitay, who wore a black leather jacket as she walked to her car, but not before greeting a fan who called her name.

In honour of the occasion, Witherspoon's children shared tributes for their mother's big milestone.

READ MORE: MAFS expert Mel Schilling dies, aged 54, following battle with cancer

READ MORE: The moment that took Miranda Kerr from a country town girl to a global icon and Australia's first Victoria's Secret Angel

READ MORE: Em Rusciano rushed to hospital after life-threatening health emergency

Her eldest child and daughter, Ava Phillippe, 26, shared a snap from the night of them hugging with the caption, "Happy 50^th, Mama! We are so blessed to love & be loved by you & to feel the warmth of your sunshine in our lives."

The Legally Blonde star wore a white beaded fringe dress, while her daughter contrasted with a long-sleeved black lace dress.

Son Deacon Phillippe, 22, also paid tribute with his own post, sharing snapshots from the night such as a video of himself and his two siblings, Ava and 13-year-old Tennessee posing with their mum on the dance floor. Deacon also shared a shot of him DJ-ing the event, as well as a throwback photo of himself with his mum and sister.

"Happy birthday 2 my mom, who happens to be the goat 🕺" he captioned the post.

Witherspoon's ex Phillippe also showed support for her milestone, leaving a smiley fave emoji in the comments of his son's post.

FOLLOW US ON WHATSAPP HERE: Stay across all the latest in celebrity, lifestyle and opinion via our WhatsApp channel. No comments, no algorithm and nobody can see your private details.