An easel stands in the forecourt of Buckingham Palace to announce the birth of a baby boy to Prince William and Catherine, Duchess of Cambridge, at St Mary's Hospital, July 22, 2013. (John Stillwell/AFP/Getty Images)

We've entered a brave new world of rapid response marketing on social media-and the birth of the royal baby proves it.

The ABC News Social Desk estimates that over 2.7 million tweets have been sent about the royal baby since 9 a.m. yesterday. Facebook says there have been over 3.5 mentions on its platform. Not to be left behind-companies took to Twitter and Facebook to capitalize on the conversation to spread their brands virally.

Oreo's marketing team wasted no time in getting their tweet up (you may remember their viral tweet from the Super Bowl blackout):

Prepare the royal bottle service! pic.twitter.com/Nlks2kT7Sw

— Oreo Cookie (@Oreo) July 22, 2013

Charmin's ready to provide a royal throne:

Get the throne ready! There's a new cub in the Royal family. #RoyalBaby pic.twitter.com/zXQMm7LHkl

— Charmin (@Charmin) July 22, 2013

Will the little prince be playing with Play-Doh? The company sure hopes so:

Congrats to the Royal Family! pic.twitter.com/ZcD6di2trN

— Play-Doh (@PlayDoh) July 22, 2013

Hostess stepped in to remind people the royal baby wasn't the only bundle of joy to be delivered this summer:

This summer, a precious little bundle of sweetness was born. And Will and Kate also had their baby. pic.twitter.com/uNeClpBbWF

— Hostess Snacks (@Hostess_Snacks) July 22, 2013

Delta Airlines:

It's a boy! Welcome, Prince of Cambridge. We can't wait to show you the world. #RoyalBaby pic.twitter.com/yHuzCIMYD2

— Delta (@Delta) July 22, 2013

While the Duchess of Cambridge was still in labor, Chili's Bar and Grill chain tweeted out this:

We want that baby born, baby born, baby born… Do you think the baby will be a Prince or a Princess? pic.twitter.com/4gxwUHUslD

— Chili's Grill & Bar (@Chilis) July 22, 2013

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But Pizza Hut proves it's more than just talk-allowing customers to cash in on their own:

Introducing our very own royal #bundleofjoy: free side or dessert to any medium or large pizza through 7/25. Code: ROYALOFFER

— Pizza Hut (@pizzahut) July 22, 2013

And if the little prince is thirsty:

And then there were three. Congratulations! pic.twitter.com/wzIDmfKsxH

— Starbucks UK (@StarbucksUK) July 22, 2013

It's a boy! #RoyalBaby pic.twitter.com/Yh7i37PEV3

— Diet Coke (@DietCoke) July 22, 2013

Time for a Royal Celebration! #Royalbaby pic.twitter.com/lITsX3lHfQ

— Coca-Cola (@CocaCola) July 22, 2013

What was your favorite marketing message around the royal baby?