It comes following the announcement that Harper Collins will publish a story about the couple, known as Posh and Becks, titled The House Of Beckham: Money, Sex And Power, written by former BBC Panorama reporter Tom Bower.
The fashion designer, who found fame in 1990s girl group the Spice Girls, also received online messages from her children - Brooklyn, Cruz and Romeo - as well as her old bandmates Emma Bunton, Melanie Brown, Melanie Chisholm and Geri Horner.
View this post on Instagram A post shared by David Beckham (@davidbeckham)
Former England soccer player David, 48, wrote on Instagram: "Happy Birthday to my beautiful wife...
"As you head into this birthday you should look back and be proud of what you have accomplished, achieved and what you have built.
"Posh spice, business woman and of course marrying an England captain.
"But your biggest success are your children, you guide them, love them and teach them...
"They love you beyond words, we all love you so much."
The heartfelt message was posted alongside a video comprised of clips showing Victoria through the years.
Horner marked Beckham's milestone birthday by sharing a series of photos of them through the years to her Instagram, marking her first social media post since husband Christian faced allegations of "inappropriate behaviour" as a Formula One team principal.
View this post on Instagram A post shared by Geri (@gerihalliwellhorner)
Bunton, 48, also known as Baby Spice, also marked the occasion with a video that included clips and photos from her and Victoria's time in the group.
She said: "Happy birthday @victoriabeckham! 50 and bossing it!
Mel C, otherwise known as Sporty Spice, said she was proud of what the pair had achieved as she posted a selection of photos and videos.
"How did we get here? 50 bloody years old!" she said.
"We have shared so many adventures together from dancing in a church hall in Woking to dancing on top of black cabs at the Olympics!!!"
Mel B, known as Scary Spice in the girl group, also wished Victoria a happy birthday and said: "Hope you have the best day."
Ahead of her birthday, Victoria said on Instagram that she felt "so incredibly blessed to have reached this milestone" and added that she was grateful for the "unconditional love and support" of husband David.
In 2023 the couples' life was explored in a four-part Netflix documentary series, which also addressed David's rise to fame as a footballer and the speculation that he allegedly had an affair while he was playing for Real Madrid in 2003
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