Ariarne Titmus spoke out against a sports betting advertisement.

The ad featured actress Sydney Sweeney.

Titmus argued it sexualised women's sport.

The advertisement sparked criticism.

Other elite athletes added their voices.

The ad was for a sports prediction company.

Separately, Titmus revealed she is engaged.

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 were part of a public backlash.

Athletes from various disciplines also weighed in.