Bec Judd looked focused on Tuesday as she ran errands in Melbourne with her mother Kerry ahead of her daughter Billie's ninth birthday.

The mother of four, 40, was spotted stuffing statement balloons - which spelled out her daughter's name - into her awaiting Range Rover.

Bec rocked a summer chic look for the outing in a stylish long-sleeved navy top and bright blue exercise pants.

The brunette beauty let her hair flow freely around her shoulders and she added a touch of glamour to her look with trendy sunglasses and a designer handbag.

She was accompanied by her lookalike mother Kerry, 60, who helped her carefully pack the inflatables into her car.

Bec celebrated her milestone 40th birthday on Friday and went all out in ensuring her party would be a night to remember.

According to the Herald Sun, Bec booked out the Mitchelton Winery for the festivities. 

Situated 137km from Melbourne, the prestige venue is known to charge up to $200 a head for special celebrations. 

The wife of AFL great Chris Judd has spoken about her workout routine in the past, saying she loves playing cardio tennis. 

'It's a cardio workout where the music blares, the coach just feeds you balls, you do awesome drills with lots of running and 60 minutes goes so quickly,' she said in 2021, adding she plays for two hours, twice a week.

'It's the only exercise I've ever done in my life where I look at my watch and I go, "Damn it, there's only 10 minutes left!" Usually I when I'm exercising I'm always watching my clock wanting it to be over.'

The TV and radio presenter previously told Daily Mail Australia she likes to keep her diet fairly relaxed, but always has a healthy dinner.

Speaking about her day on a plate, Rebecca said she enjoys muesli for breakfast, focaccia for lunch, and meat and vegetables for dinner.

Bec lives in a $7.3million mansion in Brighton in the city's southeast with her husband, retired AFL star Chris Judd, and their four children.