The actress-and-model - who announced her split from the Indian textile heir last year after four years of marriage - filed papers at London`s High Court on 01.04.11, citing Arun`s "unreasonable behaviour".
Elizabeth - who has an eight-year-old son, Damian, from a previous relationship - and Arun split last year but the news wasn`t made public until after it was revealed she had been romancing Australian cricketer Shane Warne.
She tweeted at the time: "Painful, sad days. Arun & I separated for private reasons but FTR (for the record) he has been a great father to our son Damian & will always be in his life. (sic)"
However, the 45-year-old beauty insisted she had no plans to get divorced.
She said: "Bored now of silly speculations: no one is divorcing anyone yet, no one is fighting over money and I have no plans to go to Australia. Enough! (sic)"
After news of Elizabeth and Shane`s romance was made public, the couple split but rekindled in January and in February she met his parents, Keith and Bridgette, at the sportsman`s Melbourne home.
The couple initially parted ways in December after it emerged the cricketer had been sending lewd text messages to another woman while he was romancing Elizabeth.