Kollywood actor Silambarasan withdrew from the contract of 'Ko' that is to be directed by K V Anand. Sources said that the actor pulled out of the contract saying that he would find it hard to allocate time for the movie. He was also heard to be saying that he pulled out of the film as it demanded a complete change of his appearance which would take a very long time. This would be the second major change that the 'Ko' team had to encounter. The first change of plans occured when the team decided to replace the earlier decided Tamannah with Karthika, daughter of fomer kollywood actress Radha. With the withdrawal of Simbu, it is also heard that the lead role will be done by another leading artist from the industry. The film that is produced by R S Infotainment is expected to be a total commercial mix.