Nicole Kidman's TV presenter sister ANTONIA appears to have confirmed rumours the actress is engaged to country singer Keith Urban, after being caught off-guard during an interview.

A reporter from Sydney's Daily Telegraph newspaper spoke to 34-year-old Antonia at a Disney channel party on Sunday (04DEC05), suggesting Nicole's "big news" must be very exciting for the Kidman family.

After initially replying, "Yes, yeah...", Antonia quickly retraced her enthusiasm, saying, "I mean, ah, I guess, ah, no, I don't know."

Nicole, 38, and New Zealand-born Urban, 38, reportedly got engaged over the US Thanksgiving weekend (24-27NOV05) in Nashville, Tennessee, where they celebrated the holiday with both their parents.

Antonia says, "My parents just got back last night, they had a great time but I haven't had a chance to see them and get all the news yet."