Ariarne Titmus spoke out against a sports betting advertisement.
The ad starred actress Sydney Sweeney.
Titmus claimed it sexualised women's sport.
The advertisement provoked a backlash.
Other elite athletes joined the criticism.
The ad was for a sports prediction company.
In separate news, Titmus announced her engagement.
Her fiancé is Mac Powell.
She shared the message 'Forever' on social media.
The engagement news had nothing to do with the ad.
Titmus's comments contributed to a public backlash.
Athletes from various disciplines joined in.