Lindsay Lohan failed to show up for a planned appearance at the Venice Film Festival.

The 27-year-old actress -- who has vowed to stay sober after recently being released from rehab -- was supposed to promote her latest movie 'The Canyons' at the festival on Friday but no reason was given for her absence.

Director Paul Schrader said: "For the last 16 months I've been hostage, by my own choosing, to a very talented but unpredictable actress. She was supposed to be here, she said she would be, but she is not.â€

While he found Lindsay exhausting to work with, Schrader admitted she worked hard but the process was exhausting for her.

“One of her problems as an actor is she has a very hard time faking things.â€

Despite her no-show in Venice, Lindsay has thrown herself back into work since her 90-day court-ordered rehab for substance abuse at the Cliffside Malibu treatment facility ended, filming a cameo for sitcom 'Eastbound & Down' and conducting a tell-all interview with Oprah Winfrey.

She is also wanted for a comedy series being developed by Danny McBride for HBO and it has just been revealed 'Saturday Night Live' is hoping to lure her back to host the season opener.

A source said: "'Saturday Night Live' has approached Lindsay to host the show again, and they were talking about the season opener."

Lindsay is keen to think about the offer as she is a fan of the show.

The source explained: "She is definitely considering doing it. She loves the show and the people involved."