Lara Bingle refused to confirm or deny that she is expecting a second child with Sam Worthington because it is "a personal thing".

Reports the Australian model and the Avatar actor were expecting a sibling for the first child Rocket Zot surfaced over the weekend (07-08May16), but the notoriously private couple, who didn't announce their first pregnancy or marriage, have remained tight-lipped about the rumors.

Lara appeared on the Kyle & Jackie O show on Australia's Kiis FM on Friday morning (13May16) and stayed true to form by refusing to discuss speculation that she is pregnant.

When the radio duo asked if she had some big news to announce, Lara replied, "No, I just wanted to say hi... I always want to come in and say hi."

Jackie O then asked how she feels about being asked if she's pregnant, she responded, "I think being pregnant is a personal thing for a woman and I find it weird talking to you about it... It’s something for Sam and I and it should be between us and our close family. I do find it weird people asking me."

She also praised her husband for being a wonderful father to their 13-month-old son. "It’s just life-changing but the most rewarding thing... (Sam) would have many, he loves children. He’s the best. The best husband, the best father, he’s just the best, he's my best friend. Having a child has enhanced our relationship."

The 28-year-old also refused to speak to the media when she appeared at the InStyle and Audi Women of Style awards on Thursday night (12May16), where she received the Readers' Choice prize. According to reports, she skipped the alcohol and stuck to water.

Lara only confirmed she was married to Sam, 39, last year (15). She admitted they tied the knot in Melbourne, Australia in December, 2014, when she was six months pregnant with Rocket.