Elizabeth Hurley has sparked rumours she's pregnant with her second child after trying to cover up "a little bump" at a Breast Cancer Research Foundation event in New York.

Fellow Hottest Pink Party Ever guest Elton John, who gave the actress away at her wedding to Indian businessman Arun Nayar last year (07), was also overheard congratulating Hurley's man.

A source tells In Touch magazine, "Elton kissed and hugged Elizabeth and congratulated Arun.

"They seemed to be giggling over their little secret."

Hurley wore a tummy-covering sari to the event, abstained from alcohol and "carried her clutch (bag) in front of her belly."

The insider reports, "But you could still see a little bump."

The 42-year-old Austin Powers star, who has a six-year-old son by producer Steve Bing, is refusing to confirm reports she is with child.