The Formula 1 heiress looked radiant as she attended the SHOW Beauty launch at the John Barrett Salon at the Bergdorf Goodman department store on Monday evening (23 September).
Tamara was without husband Jay Rutland, instead cosying up to former The City star Whitney Port for a photocall.
The 29-year-old announced on Monday that she is expecting her first child with businessman husband Jay, and was inundated with congratulatory messages via Twitter.
She responded: "Thank you so much for your lovely messages Jay and I feel so blessed and couldn't be more happy finding out was the best day of our lives."
And baby Ecclestone-Rutland is (technically) already a jet-setter! After last night's event in New York, Tamara tweeted: "Great launch @Bergdorfs tonight now in pjs and ready to fly back to London its always good to go home."
Tamara and Jay married in a lavish ceremony in the French Riviera in June 2013.
Two months later they made it official at the Kensington and Chelsea Register Office at Old Chelsea Town Hall in a small ceremony attended by Tamara's sister Petra and Petra's husband James Stunt.
More pregnant celebrities in our gallery below:
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