Robbie Williams has admitted he regularly smokes cannabis. The singer - who has admitted to trying heroin and entered rehab in 2007 for an addiction to prescription drugs - claims he doesn't drink alcohol but often indulges in marijuana smoking sessions to "relax." Robbie insists he doesn't "lose control" whilst taking drugs because of the responsibility he has to look after his 14-month-old daughter Theodora Rose, whom he had with wife Ayda Field. The former Take That star revealed: "Since the birth of Theo I've become less reckless. "I last drank 13 years ago, the last time I got high was two days ago. No big drug sessions, mind, just a small amount, purely to relax. "I'm allowed to go crazy once in a while, just as long as I don't lose control. I have to be there to take care of my daughter, right? That is the good thing - by putting responsibility on my shoulders she is also taking care of me." Robbie added: "She's only one now and can stand a little bit. She takes about three steps and then decides she prefers crawling. Thanks to her there is always laughter in the house.