Christie, the blunt talking governor of New Jersey, portrayed Romney as a business-minded reformer in his keynote address.
Romney, Christie said, would tell Americans the "hard truth we need to hear to put us back on the path to growth and create good-paying private-sector jobs again in America."
After a long and hard-fought primary season, Mitt Romney today officially became the Republican Party's presidential nominee, securing the 1,144 necessary votes. Delegates from New Jersey put Romney over the top, capping a race for the White House that began for Romney in 2004.
During a roll call in which each state pledged their delegates, Romney won the lion's share. However, each time delegates were pledged to Texas Rep. Ron Paul, the hall erupted in loud applause, indicative of his still insurgent support and fissures in the party.
Wisconsin Rep. Paul Ryan was later nominated to be Romney's running mate.
The roll call took place just hours after Romney arrived in Tampa today under sunny skies, a relief after Tropical Storm Isaac's threat postponed the convention for a day.
Isaac made landfall as a hurricane tonight along the Louisiana coast.