Ashton Kutcher
Ashton Kutcher wants to be able to change his daughter's nappy in a public restroom.Change.org

Ashton's Kutcher's online petition championing for baby changing facilities in male public toilets has garnered over 70,000 signatures.

The Two and Half Men star, who welcomed his first child with wife Mila Kunis in 2014, made the bold move after becoming frustrated with what he saw as the gender discrimination in shopping centres and other public spaces.

Sharing the Change.org petition on his Facebook page, the 37-year-old star explained: "It seems this idea of diaper changing stations has struck a chord. It's a pet peeve of mine when people just complain about s**t and don't do anything to improve their condition. So let's do something. In for equality? Pass it on - ‪#‎LeanInTogether (sic)."

The campaign specifically mentions US retailers, Target and Costco, and urges them to lead by example and "initiate a company-wide policy to provide universally accessible changing tables in their stores."

The post received more than 244,000 likes. Inspired by the support he received from other disgruntled parents, he continued the conversation on his web site, A Plus.

"I would like my daughter to experience a world where gender doesn't dictate one's responsibility or limit one's opportunity," Kutcher said. "Having changing tables in men's rooms is just a tiny step in the process of rectifying legacy gender discrimination. Men who are aware of this bias want to participate equally in the child care process and our society should support that. It's time to get our hands dirty."

Target has since responded by saying it has "made changing tables a standard feature in both our men's and women's restrooms for more than 25 years."

Kutcher, who was married previously married to Demi Moore, went public with his romance with Mila Kunis in July 2012. The couple welcomed their daughter Wyatt Isabelle Kutcher in September 2014.