Showbiz
Rex Features
The actress fuelled rumours of a romance when she reportedly left a message from Ronson on her Blackberry which referred to their "four-month anniversary".
A source is quoted as saying: "It said: 'I love you, honey. Happy four-month anniversary!' They are madly in love.”
Speculation has been rife that the pair are more than friends after they were seen hugging and kissing on several occasions.
Ronson's friends have also claimed that she has updated her lovelife status on social networking website Facebook from "single" to "in a relationship".
> Ronson buys Lohan £11,000 Cartier ring
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