Ariarne Titmus spoke out against a sports betting advertisement.
The ad featured actress Sydney Sweeney.
Titmus claimed it sexualised women's sport.
The advertisement sparked criticism.
Other elite athletes also spoke out.
The ad promoted a sports prediction company.
As a separate matter, Titmus announced her engagement.
Her fiancé has been named as Mac Powell.
She shared the message 'Forever' on social media.
The engagement news bore no relation to the ad.
Titmus's comments formed part of a public backlash.
Athletes across different sports joined in.