United Kingdom, Feb. 28 -- Chris Pratt has contracted a lung infection after the births of three of his children because of a celebratory ritual with father-in-law Arnold Schwarzenegger.

The 'Guardians of the Galaxy' star - who has 12-year-old Jack with first wife Anna Faris and Lyla, four, Eloise, two, and three-month-old Ford with spouse Katherine Schwarzenegger - suffers from asthma but despite the health implications, has felt "pressure" to join the 'Terminator' legend in smoking a cigar after welcoming a new baby into the world.

Speaking to guest host Claudia Winkleman on 'The Graham Norton Show', he said: "[Arnold] is a big cigar smoker - he's always smoking one on set, in his car, and in my living room.

"When we have a baby, he ...