Ariarne Titmus spoke out against a sports betting advertisement.

The ad featured actress Sydney Sweeney.

Titmus said it sexualised women's sport.

The advertisement provoked a backlash.

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 shared the message 'Forever' on social media.

The engagement news was unrelated to the ad.

Titmus's comments contributed to a public backlash.

Athletes from various disciplines joined in.