She welcomed her first child with husband Robbie Furze in May.
And Lady Mary Charteris and her rocker beau enjoyed a night out together at the launch dinner for Roxy x Liberty fabrics at Sea Containers in London on Thursday.
The socialite, 34, showcased her stunning postpatrum figure in a form-fitting black top with chic puff sleeves, teamed with a pair of straight leg black jeans.
Glam: Lady Mary Charteris and her rocker beau enjoyed a night out together at the launch dinner for Roxy x Liberty fabrics at Sea Containers in London on Thursday
Lady Mary boosted her frame with a pair of lace-up black heeled boots.
She wore her blush-tinted locks in a loose blown out style and enhanced her pretty features with a full face of neutral make-up.
She added a touch of bling to her ensemble with a chunky gold chain necklace.
Chic: The socialite, 34, showcased her stunning postpatrum figure in a form-fitting black top with chic puff sleeves, teamed with a pair of straight leg black jeans
Work it: Lady Mary boosted her frame with a pair of lace-up black heeled boots
Meanwhile, rocker Robbie, 43, sported a black shirt with a denim jacket, which he styled with trousers and a pair of biker boots.
The singer and mode took to Instagram to share a picture of daughter Wilde Jessie Furze, who was born on 21st May.
Lady Mary shared a sweet shot from hospital holding her little bundle of joy next to her husband, star of electronic rock The Big Pink.
Aw: Lady Mary welcomed her first child with husband Robbie Furze. Lady Mary shared a sweet shot from hospital holding her little bundle of joy next to her husband, star of electronic rock The Big Pink
Looking overjoyed with her new little one, the DJ daughter of James Charteris, Earl of Wemyss and March and Catherine Ingrid Guinness posted the caption: 'Welcome to the world, Wilde Jessie Furze, 21/05/21, followed by two pink bow emojis.
While Mary and Robbie spend a lot of time in LA, it's believed the little one was born on British soil as the couple have been pictured in London in recent weeks.
Well heeled friends of Lady Mary quickly took to the comments section to congratulate the couple on the news, with Sadie Frost writing: 'Oh how beautiful .. can’t wait to meet her'.
Daisy Lowe added: 'Congratulations! Wilde is absolutely gorgeous! Over the moon for you all- sending all my love'.
Millie Mackintosh commented a trio of hearts while Laura Whitmore added: 'Ahhh so happy for you guys xxx'.
New mum Lady Mary has modelled for the likes of Tatler, Vanity Fair, Vogue and Love, and is now best known as a DJ and member of electronic rock band The Big Pink.
Cute: She took to Instagram to share a picture of daughter Wilde Jessie Furze, who was born on 21st May
Her husband Robbie is a musician and plays alongside his wife in The Big Pink.
Once known as a wild party girl, Lady Mary celebrated two years sober last year.
She is the youngest child and only daughter of James Charteris and his first wife Catherine, who is the daughter of Guinness
