Ariarne Titmus criticised a sports betting advertisement.
The ad included actress Sydney Sweeney.
Titmus claimed it sexualised women's sport.
The advertisement provoked a backlash.
Other elite athletes also spoke out.
The ad promoted a sports prediction company.
In separate news, Titmus revealed she is engaged.
Her fiancé has been named as Mac Powell.
She posted the word 'Forever' on social media.
The engagement news had nothing to do with the ad.
Titmus's comments were part of a public backlash.
Athletes from different sports added their voices.