Ariarne Titmus spoke out against a sports betting advertisement.

The ad included actress Sydney Sweeney.

Titmus claimed it sexualised women's sport.

The advertisement sparked criticism.

Other elite athletes also spoke out.

The ad came from a sports prediction company.

As a separate matter, Titmus shared her engagement news.

Her fiancé is Mac Powell.

She posted the word '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 added their voices.