The jet-setting actress was glowing as she stepped off the plane at JFK airport on Thursday.
And she had a big smile across her face despite the fact that her ex fiancé Shane Warne was recently seen hanging out with her younger doppelgänger in Sydney.
She kept her chest warm with a black patterned scarf and added skinny jeans and black lace-ups to complete her high-flying look.
In true celebrity style, Liz donned a pair of shades to shield her jet-lagged eyes as she hauled a small Louis Vuitton case behind her.
On the other side of the world, Shane Warne was busy proving that he definitely has a type.
The hunky cricketer, 45, was spotted leaving leaving Sydney's Ivy nightclub on Wednesday evening alongside Fox Sports News presenter Neroli Meadows.
The pretty brunette bears a striking resemblance to his ex, whom he called time on his engagement with over a year ago.
Shane is thought to have been single and ready to mingle after splitting from Playboy model Emily Scott last September.
Meanwhile, Liz is set to hit screens as Queen Helena when her upcoming show The Royals debuts in March.
But for now, she proved to be in parent and work mode prior to leaving her home in London, as she packed her 12-year-old son Damian off to school before heading to Heathrow Airport earlier in the day.
As an Estee Lauder spokesmodel, the mother-of-one constantly has had a long history of making regular transtlantic trips.
Taking to her Twitter account on Tuesday, the star wrote: 'Parallel packing: football boots and Latin books for my son and NY/LA trip for me.'
She later added: 'A last day of the hols dinner with my son at his favourite restaurant Lucio, and now movie night. Bliss'.
And as she prepared to take off for her flight to the US, Elizabeth shared another tweet, where she showed off a snapshot of her new leather-bound diary.
'A whole flight dedicated to filling in new diary. In heaven,' she wrote from her first class surroundings.A teaser trailer from E! show The Royals has already seen raunchy Elizabeth in character, but a new promotional still finds her looking considerably more regal in a heavily embellished gown befitting a prominent member of the Royal family.
With a gilded gold crown atop her head, the actress – a former Estee Lauder model – offers the camera a smouldering look, her hands pressed against her slender hips.
The new shot comes just days after the release of a new trailer, during which her character dreams up a Christmas Day queen's speech that's far from family friendly.
