Pregnant Princess Beatrice sparks fan frenzy as she steps out with mum Fergie on birthday

looked radiant as she stepped out on Tuesday to join her mother, , on , for an afternoon at the Lady Garden Foundation lunch.

The event aimed to raise funds for the charity, which promotes awareness around women's gynaecological health.

Beatrice, , was a vision in raspberry red as she recycled an old shirt dress by Topshop in floral print.

She matched the dress with Jennifer Behr's Rachael headband in mulberry, her beloved Strathberry mosaic nano bag in black, black tights and black heeled ankle boots.

The princess let her auburn locks down in loose waves and kept her make-up fresh and glowy.

Her mother, Fergie, as she is known to family and friends, looked equally stunning as she sported a black skirt paired with a tie-neck printed blouse and pointed heels.

The two women looked joyous as they posed for photos during the event.

Royal fans loved Beatrice's look and praised her on social media.

One user wrote: "I love this look on Beatrice!!"

A second one added: "Princess Beatrice looks smart is that Topshop."

A third one said: "Aw, this is the cutest ensemble I've ever seen on Princess Beatrice! She looks absolutely adorable. Her mom looks nice too."

A fourth one agreed: "I love Princess Beatrice's dress. It's a beautiful color(sic)."

A fifth one opined: "I think Bea looks beautiful in this. It's a good color(sic) for her."

It comes just weeks after Buckingham Palace announced Beatrice is expecting her second child with Edoardo Mapelli Mozzi.

The new royal baby is expected to arrive early next year.