The 51-year-old fashion designer has been married to Beckham, 50, since 1999 and took to social media in the hours after he was knighted in the King's Birthday Honours to acknowledge the "passion" that led him to this point.
"You've always been my knight in shining armour, but now it's official. Sir @davidbeckham!!! What an honour, I couldn't be prouder of you," she wrote on Instagram.
"Your dedication to the things that matter most - your country, your work, your passion, and most of all, your family - has never wavered.
"The way you've touched so many lives over the years with kindness and humility speaks volumes about the man you are and continues to inspire us every day.
"But above all else, I'm so, so proud to call you mine. I love you so much xxxx"
The couple - parents to Brooklyn, 26, Romeo, 22, Cruz, 20, and 13-year-old Harper - will now be known as Sir David Beckham and Lady Victoria Beckham.
Upon receiving the honour, the former English team captain admitted he found it a "truly humbling" experience.
"Growing up in East London with parents and grandparents who were so patriotic and proud to be British, I never could have imagined I would receive such a truly humbling," he said
"To have played for and captained my country was the greatest privilege of my career, and literally a boyhood dream come true.
"I've been so lucky to be able to do the work that I do and I'm grateful to be recognised for work that gives me so much fulfilment.
"It will take a little while for the news to sink in but I'm immensely proud and it's such an emotional moment for me to share with my family."
The former Manchester United star - given an OBE by the late Queen Elizabeth in 2003 for services to football - also has a long history of carrying out charitable work.
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