Petra Ecclestone, who is believed to have had a daughter, stepped out for lunch in LA on Thursday

She is yet to confirm reports that she has given birth to a little girl called Lavinia.
But unconcerned about making an official announcement, Petra Ecclestone decided to take a break from her new role and treat herself to a leisurely lunch. 
The heiress, who has instantly snapped back to her former shape, was joined by her newly engaged sister Tamara and her fiancé Jay Rutlland in Los Angeles.

Looking good: Petra Ecclestone, who is believed to have had a daughter, stepped out for lunch in LA on Thursday

The 24-year-old mother showed off her figure in a tight grey dress, which she wore with a pair of denim platform trainers.

 

She accessorised her look with a pink patterned scarf and a grey handbag, while her long blonde hair was worn loose and she covered her eyes with sunglasses.
While Petra certainly looked bronzed, her tan just didn’t compare to her old sister’s Tamara, who has recently been sporting a rather extreme colour. 

Sister time: Petra was joined by her sister Tamara who was sporting a very deep tan

Snapped back: There was no sign on Petra that she had recently given birth to a little girl, as she looked extremely slim

Just the two of us: Tamara and Petra were joined for lunch by Tamara's fiance Jay Rutland

The brunette looked casual for their lunch date wearing a khaki coloured T-shirt with a ruffled skirt and a pair of sand coloured ankle boots, with a very slight heel.
She was accompanied by her husband-to-be who wore a pair of chino shorts with a crisp shirt and blue loafers.
The couple seemed to be engaged in a serious conversation and stopped in the street to hash things out.

Dressed down: Petra's trainers added a casual aspect to the her look, while her dress was quite smart

Everything ok? The couple who are due to be married looked deep in conversation as they arrived at the restaurant

Perhaps the pair were discussing one of Tamara’s tattoos, as before lunch she tweeted: ‘A quick trip to fix a tattoo LA Ink before lunch.’
It’s thought that Petra welcomed her first child into the world at the end of February, according to HELLO! Online.
The website reported that Petra gave birth in a hospital in London, before flying back to Los Angeles - where she lives with husband James Stunt.

Matching tans: The couple were sporting very similar tans after yet another holiday

Is everything ok? Tamara and Jay look like they are in the middle of a serious conversation

Reports that Petra had had her daughter first began when 'Baby Girl' balloons were spotted being delivered to her home earlier in the month.
The F1 heiress is unlikely to speak publicly about Lavinia's birth, considering that she never even announced her pregnancy - leaving it to her sister Tamara to let slip.
Tamara, 28, is currently in Los Angeles herself with fiancé Jay, 31, as they enjoy a seemingly endless holiday in the run up to their wedding in June at the Cap D'Antibes in the south of France.

Ray of light: The pretty heiress really stood out during the lunch with her flowing blonde locks