Lindsay Lohan and Samantha Ronson have gone public with their romance, after the DJ displayed a picture of the pair kissing on her MySpace page.

The constant companions are yet to publicly confirm their relationship, although Lindsay came closest when she announced recently, "I just want to live a happy, healthy year and continue on the path I've been on. And, you know, be with the person that I care about and my family."

Now the sister of super-producer Mark Ronson has posted a picture of her puckering up with the Mean Girls actress, with the caption “calm down” no doubt addressing the rumours of their affair.

Lindsay Lohan & Samantha Ronson: Get a room

Have LA’s worst-kept secret finally been revealed?