Actress Lindsay Lohan was hospitalised on Thursday after reportedly falling victim to her chronic asthma.

Lohan, 21, was spotted leaving a Los Angeles emergency room with best friend Samantha Ronson in the late hours after returning to the city from New York.

Sources tell website TMZ.com the Mean Girls star spent over two hours in Century City Hospital's E.R. after enduring the six-hour bicoastal flight.

According to reports, the actress began to experience discomfort in her chest and asked flight attendants for a warm compress to ease her pain.

But she caused chaos among other passengers - including actor Stephen Baldwin - as she moved around the plane so she could sit next to Ronson.