Princess Anne's no-fuss baby bump photos with Zara Tindall and Peter Phillips

It may have been a sunny day, but Anne wasn't taking any chances with the October weather while she was expecting her first child. The royal, who was eight months pregnant, wore her trusted boots, wide-leg trousers and head scarf alongside a fair isle knit that highlighted her blossoming bump.

The rest of us may embrace comfort when we travel long distances, but the Princess showed off her chic maternity wardrobe in a white floaty midi coat with caped sleeves as she landed back in the UK following a trip to America. Anne was spotted placing a hand affectionately on her stomach, sharing a peek at her patterned dress underneath.

Muddy boots were nowhere to be seen during the royal's visit to Newhan City Farm in 1977. Alongside smart ballet pumps with a mini heel, Anne wore a floral dress with balloon sleeves and a loose fit to accommodate her bump.

While filming the TV show Horses in our Blood in May 1977, Princess Anne kept it casual in grey jeans and a wool jacket. The latter concealed her pregnancy, keeping all attention on the horses.

At six months pregnant, Anne showed no signs of slowing down as she visited St Katherine's Dock for a royal engagement. She wore a fit and flare ivory coat dress with statement buttons and a Peter Pan collar, crossing her hands neatly across her stomach.

Heavily pregnant Anne gave us a lesson in no-fuss dressing as she layered up in a collared shirt, a jumper and a quilted jacket, which she left unbuttoned at the bottom for comfort. Her outing at the Chatsworth Horse Trials took place just one month before she gave birth.

Anne made the most of her maternity wardrobe for her second pregnancy, recycling her floaty white caped coat dress from 1977 for her sister-in-law's wedding in 1981. Once again, she layered a bold dress underneath, this time in a retro 80s swirl print that matched her headscarf.

One month before her due date, Anne was pictured strolling with her son Peter at the Badminton Horse Trials. Sticking true to her signature off-duty style, she wore a bump-skimming jumper with a Barber jacket.

The Princess Royal added a touch of glamour to her loose-fit midi dress at the Windsor Horse Show in March 1981 with patent knee-high boots.

Just weeks before she gave birth to Zara, Anne showcased her beautiful bump – which was particularly prominent as she stood side-on to the camera – in a knee-length coat.

As the President of The Save the Children Fund, Princess Anne wasn't going to miss the premiere of Stop Polio. She looked effortlessly elegant in her abstract dress featuring a pussybow neckline and balloon sleeves.