Rebel Wilson screams her lungs out as she throws her support behind Alex de Minaur at the Australian Open

Rebel Wilson appeared to be having the time of her life on Sunday as she attended the fourth round of the Australian Open tennis championships in Melbourne.

The Australian actress, 43, rocked her best from the stands in a stylish unbuttoned pink blazer which she paired with a black and white striped shirt.

She let her blonde locks hang in loose waves around her shoulders and completed her outfit with a black baseball cap.

Rebel looked engrossed in the match and was seen enthusiastically cheering on Australian Alex de Minaur as he took on Russian pro Andrei Rublev.

Her infectious enthusiasm and beaming smile were a testament to the fun day she had as she watched every serve of the gripping tennis match.

Rebel Wilson (pictured) looked to be having the time of her life on Sunday as she attended the fourth round of the Australian Open tennis championships in Melbourne

The Australian actress, 43, rocked her best from the stands in a stylish unbuttoned pink blazer which she paired with a black and white striped shirt

The Australian actress, 43, rocked her best from the stands in a stylish unbuttoned pink blazer which she paired with a black and white striped shirt

The Sydney-born star embraced her natural beauty at the event by opting for a minimal makeup look.

At one point, she was seen standing up in her seat to get a better view of the match and enthusiastically shouting out messages of support.

Rebel’s fun day out comes after she gave fans some hints about what to expect from her upcoming tell-all memoir called Rebel Rising.

The Bridesmaid star shared a video on Instagram last month of herself signing the first 4,000 copies of her book for eager fans.

The Sydney-born star told fans they can expect her book to challenge their preconceptions about who she is as a person.

‘I can’t wait for you to read this, you’re going to see a whole new side of me. Lots of funny and serious stuff,” she began.

Rebel let her blonde locks hang in loose waves around her shoulders and completed her outfit with a black baseball cap

Rebel let her blonde locks hang in loose waves around her shoulders and completed her outfit with a black baseball cap

‘Hopefully you will love the book as much as I enjoyed writing it. Although at times it was heartbreaking and emotional.”

Rebel Rising, which hits bookstores in April, promises an intimate exploration of Wilson that goes beyond her public persona.

In October, the veteran artist revealed on social media that she had written a memoir, saying it would reveal a never-before-seen side of her.

Her infectious enthusiasm and beaming smile were a testament to the fun day she had watching the gripping tennis match

Her infectious enthusiasm and beaming smile were a testament to the fun day she had watching the gripping tennis match