Hilary Duff, Jamie Chung, and Jamie-Lynn Sigler glam up for St. Jude benefit in ...

Hilary Duff, Jamie Chung, and Jamie-Lynn Sigler glammed up for the launch of Saint by Ira DeWitt candle collection benefitting St. Jude Children's Research Hospital at Mr. Chow in Beverly Hills on Wednesday.

31-year-old Hilary flashed her effervescent smile and her new engagement ring while clad in a black jungle-print midi-dress selected by stylist Jessica Paster.

Duff accessorized her charity look with a gold clutch, statement earrings, and nude stilettos.  

Hairstylist Jill Buck coiffed the former Disney Channel star's flaxen locks and make-up artist Allan Avendaño applied her pink pout.

Earlier that same morning, the blonde Texan detailed her May 7 engagement to Winnetka Bowling League frontman Matthew Koma, with whom she has seven-month-old daughter Banks Violet Bair.

'He's like, let's go for walk, let's go check out this park. And we were living in Williamsburg [Brooklyn], and I was like, "I'm so tired,"' Hilary told CBS' .

'"I just want to eat dinner in bed and watch Game of Thrones." So, we go, we find this gorgeous park, and he presents me with this book that he said he's been working on for a while. And he's like, it's our story. We're going to forget things along the way, so we need to constantly fill this out, so our kids can know our story.' 

Betrothed: 31-year-old Hilary flashed her effervescent smile and her new engagement ring while clad in a black jungle-print midi-dress selected by stylist Jessica Paster

Betrothed: 31-year-old Hilary flashed her effervescent smile and her new engagement ring while clad in a black jungle-print midi-dress selected by stylist Jessica Paster

Bride-to-be: Duff accessorized her charity look with a gold clutch, statement earrings, and nude stilettos

Bride-to-be: Duff accessorized her charity look with a gold clutch, statement earrings, and nude stilettos

Bride-to-be: Duff accessorized her charity look with a gold clutch, statement earrings, and nude stilettos

Blonde ambition: Hairstylist Jill Buck coiffed the former Disney Channel star's flaxen locks and make-up artist Allan Avendaño applied her pink pout

Blonde ambition: Hairstylist Jill Buck coiffed the former Disney Channel star's flaxen locks and make-up artist Allan Avendaño applied her pink pout

Duff continued: 'And when I got to the end there was like a little part I peeled open and it was my ring was inside. It was so sweet. He got down on one knee and he's like, "I forgot everything I'm supposed to say. You're my best friend."'

The bride and groom-to-be first dated for three months in 2016 before rekindling their on/off romance in 2017.

It will be the Haunting of Sharon Tate actress' second marriage after retired NHL star Mike Comrie, with whom she has seven-year-old son Luca Cruz.

Wednesday also marked the sixth season premiere of TV Land's Younger, in which she stars as Empirical publisher Kelsey Peters. 

'He got down on one knee': Earlier that same morning, the blonde Texan detailed her May 7 engagement to Winnetka Bowling League frontman Matthew Koma, with whom she has seven-month-old daughter Banks Violet Bair

'He got down on one knee': Earlier that same morning, the blonde Texan detailed her May 7 engagement to Winnetka Bowling League frontman Matthew Koma, with whom she has seven-month-old daughter Banks Violet Bair

'It was so sweet': Hilary told CBS' The Talk that the musician presented her with a book of their memories and 'there was like a little part I peeled open and it was my ring was inside'

'It was so sweet': Hilary told CBS' The Talk that the musician presented her with a book of their memories and 'there was like a little part I peeled open and it was my ring was inside'

'Big Day': Wednesday also marked the sixth season premiere of TV Land's Younger, in which Duff stars as Empirical publisher Kelsey Peters

'Big Day': Wednesday also marked the sixth season premiere of TV Land's Younger, in which Duff stars as Empirical publisher Kelsey Peters

Meanwhile, 36-year-old Jamie donned a grey wrap blazer dress at the Saint

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