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Elizabeth Hurley has filed for divorce from her estranged husband, Arun Nayar, according to a new report.

The 45-year-old actress filed papers in London, citing “unreasonable behaviour” as the reason for the split, according to the Daily Mail. Elizabeth and Arun, a 46-year-old textile heir, were married for four years.

Elizabeth announced her separation from Arun back in December after allegations of her infidelity were printed in a tabloid.

Despite the situation, Elizabeth seems to be in good spirits, tweeting “Happy Mother’s Day to all. My son woke me at 5.45am this morning to tell me how much he loved me….thanks Damian!!”

Elizabeth Hurley has confirmed her separation from husband Arun Nayar.

The 45-year-old British actress explained the situation after allegations of her cheating with a cricket player surfaced in a tabloid.

“Not a great day,” Elizabeth tweeted. “For the record, my husband Arun & I separated a few months ago. Our close family & friends were aware of this.”

Elizabeth and Arun married in March of 2007 in two exotic ceremonies in England and India.

Elizabeth Hurley shows off her plunging neckline with her husband Arun Nayar at the Amber Fashion Show and Auction held at the Meridien Beach Plaza on Friday in Monte Carlo, Monaco.

The Austin Powers actress recently presented at the 2008 Cinema against AIDS gala – one of Europe’s main charity events. Hurley, 42, was joined by Sean Combs, Christian Slater, Diane Kruger, Michelle Yeoh and Milla Jovovich.

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Newlyweds Elizabeth Hurley and Arun Nayar arrive in India for traditional wedding celebrations, which includes “six days of traditional Indian festivities that will culminate in a ceremony at a maharaja’s lavish palace.” The model-actress and Indian businessman were spotted at Mumbai airport.

Liz and her new hubby have already enjoyed one wedding, after they secretly tied the knot in a civil ceremony at Sudeley Castle, in Gloucestershire, England on Firday. Good friend Elton John walked Liz down the aisle and even serenaded her, dedicating his hit Your Song to the bride.

For pictures from Liz Hurley‘s actual wedding ceremony, CLICK HERE!