Ariarne Titmus has criticised a sports betting advertisement.

The ad featured actress Sydney Sweeney.

Titmus said it sexualised women's sport.

The advertisement drew criticism.

Other elite athletes joined the criticism.

The ad was for a sports prediction company.

Separately, Titmus shared her engagement news.

Her fiancé is Mac Powell.

She wrote the word 'Forever' on social media.

The engagement news had nothing to do with the ad.

Titmus's comments formed part of a public backlash.

Athletes from different sports joined in.