Twitter was set alight with praise for 42-year-old Wendi, with comments suggesting she had made the hearing worth watching, it said.
Wendi, who came from middle-class China to marry one of the world's most powerful media moguls, gave a dramatic stand-by-your-man display.
She was dubbed 'Smack Down Sister' on Chinese websites.
The Yale University business school graduate, yoga devotee and former News Corp employee reacted faster than anyone else seated around Murdoch, including his son James, when the incident took place.
The hearing in the News of the World phone hacking case by a British parliamentary panel was interrupted by a man throwing a shaving-cream pie at her 80-year-old husband.
Image: A screen grab image taken in London on July 19, 2011, shows News Corporation Chief Rupert Murdoch (Front R) and his son James (Front L) giving evidence to a Parliamentary Select Committee on the phone hacking scandal, as Rupert Murdoch's wife Wendi Deng (C) looks on.
Image credit: AFP PHOTO/PARBUL