On January 24, 2006, CBS Corporation and Warner Bros. announced that they were to create a new broadcast network, The CW. The network officially debuted on September 18, 2006. The network formally debuted on September 20 with the 2-hour premiere of "America's Next Top Model". The network is the result of a merger of The WB (a Warner Bros. holding) and UPN (a CBS Corporation holding). CBS Corporation and Time Warner each own 50% of the network. Tribune Broadcasting (which previously owned a 25% stake on The WB) and CBS Corporation contributed its stations as new network affiliates.