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Little Alia Joy made history last month after becoming the first baby to be breastfed in Australia's federal parliament.

Now her mother Larissa Waters has proudly gone one step further and addressed parliament while nursing her three-month-old daughter.

The 40-year-old mother and Greens MP passed a motion on black lung disease in the chamber today with Alia in her arms and a white towel slung over her shoulder.

Around her, politicians welcomed her doing so - with one politician Richard Di Natale even seen playing with the infant afterwards.

(Image: REUTERS) (Image: AAP)

Senator Waters, from Queensland, expressed her delight at becoming the first politician to move a motion while breastfeeding on social media afterwards.

"First time I've had to move a Senate motion while breastfeeding! And my partner in crime moved her own motion just before mine, bless her," she told her 30,000 followers on Twitter.

(Image: REUTERS) (Image: AAP)

Alia has joined her mother in the chamber during several debates since her birth as well as the Midwinter Ball charity event.

The first time she appeared was during a vote in May this year when she became the first baby to be breastfed in the Senate.

She wrote afterwards: "So proud that my daughter Alia is the first baby to be breastfed in the federal Parliament! We need more #women & parents in Parli"

(Image: AAP)

She also pointed out that MP Kirstie Marshall had been ejected for breastfeeding her 11-day-old daughter Charlotte in the Victorian Parliament back in 2003 - saying "look how far we have come!".

And in 2009 another Greens MP Sarah Hanson-Young had her two-year-old child removed after taking her into the Senate.

Since returning from maternity leave in March, Senate Waters has called for an increase in the number of women and parents in parliament.

She also pushed for a change in the rules last year to allow new parents to care for their babies in the Senate.