Sienna Miller is holding up bravely at Glastonbury

Sienna Miller put on a brave face as she got into the festival mood as she donned a stylish pair of jeans as she stepped into Glastonbury on Sunday.

Her appearance comes shortly after the Hollywood star’s older sister, Savannah Miller, revealed that their father is battling Alzheimer’s disease.

The actress, 41, smiled as she arrived in the blue cropped jacket, which she paired with matching shorts as she wandered around the festival at Worthy Farm.

The beauty turned heads in her look, sporting a cinched waist with a thick beige belt and a pair of silver cowboy boots.

The Anatomy Of A Scandal star rocked a pair of striking black sunglasses and applied a radiant makeup palette.

Looking good: The actress, 41, was all smiles in the chic blue short jacket, which she paired with matching shorts as she wandered around the festival at Worthy Farm

Sienna styled her long blonde locks in loose waves that fell over her shoulders in a center parting.

Sienna’s sister shared the heartbreaking news earlier this month when she paid tribute to their father amid his ailing health.

Alongside a photo of their father, former art dealer Edwin Miller, Savannah shared a heartfelt Instagram post where she stated she “missed him beyond words.”

She wrote: ‘here he is.. my daddy, the man with the deepest heart, the wisest words and the most incredible hugger who ever lived. I miss him indescribably.

“As his Alzheimer’s progresses and he slowly withdraws from the world, my heart aches for this man. His embraces are still as deep, thank God, but life and the spark that permeates everything has gone out.’

She concluded, “It’s so brutal and complicated to navigate. Sending love to everyone for whom today is difficult. #father’s day #alzheimer’s.

The Miller kids rally behind their father as he battles dementia.

In March, Sienna, 41, joined bridal wear designer Savannah, 44, in New York, hugging their father with his sons, Stephen and Charles, from a previous relationship.

Stunning: The beauty wore a pair of silver cowboy boots and rocked a pair of striking black sunglasses with her outfit

“For the first time in six years, we’re all together with our dad,” Savannah wrote. ‘A lot has changed in that time, with his declining health, but at the same time nothing at all.

“Love feels the same, as deep and true as it ever did. We may be oceans apart, but our love for each other and our daddy transcends it all.

“In these very real moments, I am gracefully reminded of what it’s all about. Love and human connection is all we ever really have and I am very grateful for the love and connection I have with these four remarkable people, my family. ❤️’

The sisters’ mother is ex-model Jo Miller, who was married to Edwin until 1987. He next married interior designer Kelly Hoppen.

When Sienna returned to New York City, she found solace in living closer again to her father Edwin, who continued to live and work in the Big Apple.

In 2015, Edwin was a mainstay for Sienna when she broke up with Tom Sturridge, the father of her 10-year-old daughter Marlowe.

She has since healed her heartache and is in love with her boyfriend Oli Green, 25, with whom she has been linked since 2022.

After three broken engagements, Sienna was rumored to be dating Oli after they attended the BAFTAs together and enjoyed a New York Knicks basketball game.

The couple was also photographed posing together on the red carpet at the Vanity Fair Oscars Party.

So sad: It comes as the Hollywood star’s older sister, Savannah Miller, revealed their dad is battling Alzheimer’s (pictured in 2020)