Lindsay Lohan gives her 14-year-old sister dating tips.

The ‘Mean Girls’ actress – who is currently in a relationship with DJ Samantha Ronson – has told Ali not to worry about her sexuality, insisting she must do whatever makes her happy.

She said: “Ali's very mature. I've told her that it's OK to like a boy or a girl if you're comfortable with it and it's something you believe you want to do. And I told her not to be afraid of who she wants to be.”

Lindsay, 22, also revealed her sibling fully supports her relationship with Samantha because she likes seeing her so happy.

She said: “Ali has known Samantha for a really long time. And she's like, 'Whatever it is, I support you. I probably won't ever do what it is you're doing, but I'm happy for you.' ”