Tina Knowles and Beyonce Knowles at The Launch Of House Of Dereon By Beyonce And Tina Knowles at Selfridges on September 17, 2011 in London

*Beyonce Knowles was on hand Saturday to launch her House of Dereon collection in the UK as part of London Fashion Week.

The singer-actress, who is expecting her first child with husband Jay-Z, joined her mom/business partner Tina Knowles to unveil the line at exclusive store Selfridges, where the pair paraded down the catwalk hand-in-hand.

Celebs at the launch included Paloma Faith, Eliza Doolittle and Rosario Dawson. However, one A-list friend who failed to attend was Beyonce’s homegirl Gwyneth Paltrow. Bey reportedly delayed the catwalk show for 45 minutes in the hope the Oscar-winner would turn up but eventually had to go ahead without her.

A source told The Sun newspaper: “Beyonce halted the whole thing because she thought Gwyneth was about to arrive. She kept calling her but she didn’t show. People couldn’t wait any longer and they had to get on with it. Beyonce wasn’t angry. She was just disappointed.”

Another insider told the paper afterward: “It was Beyonce’s first fashion show outside the US – and she was thrilled with it.”