Lindsay Lohan's Sam account

Actress Lindsay Lohan arrives for the grand opening of Atlantis, The Palm in Dubai November 20, 2008. The $1.5 billion mega resort with 1,539 rooms is the first resort to open on Dubai's man-made Palm Jumeirah island. [Agencies]

Lindsay Lohan has set up a joint account with her girlfriend Samantha Ronson.

The 'Mean Girls' actress is so keen to show her commitment to her DJ lover she has deposited huge sums of cash for their life together.

A source said: "Lindsay was reportedly earning £122,000 per episode for her stint on 'Ugly Betty' last year and she's put that into a joint account to show Samantha how much she loves her."

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Lindsay, 22, is believed to have made the gesture to reimburse 33-year-old Sam - who has been able to command huge fees for her DJ sets since her relationship with the star was revealed - for all the cash she has spent on the couple's romantic getaways.

The source added to Britain's Daily Express newspaper: "Sam's very generous to Lindsay. She pays for everything when they go away together and Lindsay wants to show her gratitude by doing this.

"Sam is completely disinterested in shopping and things, whereas Lindsay loves to spend and always says she wants to be as rich as possible.

"Having a joint account with Sam is a huge step for her."

Lindsay and Samantha - the sister of producer Mark Ronson - have also bought a property in Dubai's exclusive Palm Island development.

The pair fell in love with the Middle Eastern city after Samantha recently performed a DJ set there.