After a Las Vegas party and a special investor event to mark the milestone, Domino's Pizza officially celebrates its 50th birthday today.

From the humble beginnings of the first store, which opened in the college town of Ypsilanti, Mich., Domino's Pizza has since been dominating the pizza delivery industry. In celebration of the company's birthday, Domino's will ring The Closing Bell at the New York Stock Exchange today.

"Many things have evolved and grown in our 50 years as a company, with some of the most memorable Domino's moments occurring in 2010," said J. Patrick Doyle, president and CEO of Domino's Pizza, which is headquartered in Ann Arbor, Mich. "We have built an iconic consumer brand that is recognized nearly everywhere in the world, from just one store in Michigan back in 1960. One thing remains consistent, though: our ability to deliver hot, delicious food to our customers right when they want it. It's what Domino's Pizza is known for."

At the NYSE, four international master franchisees will join Domino's executives for a presentation to investors, analysts and selected media members. The presentation, "Marking 50 Years of Global Success," will be broadcasted live over the Internet beginning at 9 a.m. EST.

This year has proven to be just one of the many milestones the company has faced. Besides opening the company's 9,000th store, Domino's also launched a massive recipe reinvention campaign, "Pizza Turnaround." The campaign brought a total overhaul of  the Domino's recipe, adding new and bold flavors to satisfy customers' wants. Due to this overhaul, the company received the distinguished "Chain of the Year" award from Pizza Today, the industry's leading publication.

In addition, 2010 brought significant sales growth for the chain. During the third quarter, Domino's same-store sales rose 11.6 percent, and international same-store sales were up 5.9 percent.

Domino's also wants to celebrate with its customers with a special offer. To find out what the offer will be, go to Domino's Pizza Facebook page and click the "like" option. The offer will run for only one week, ending on Dec. 19.