Munoz said it's important to keep Latinos engaged through the inauguration and beyond.
"Our work is not done. It doesn't end," he said. "We have a tendency to look at this phenomenon as ending on Election Day, when the reality is now it's time to get to work."
Longoria said this is her first inauguration. She has taken on a new role as political advocate since her days on "Desperate Housewives," pushing for a Latino history museum in Washington and raising funds for Obama's re-election.
Even though this is Obama's second inauguration, Longoria said there is still much to celebrate, including Sotomayor's role swearing in the vice president.
"There's something special about seeing a president recommit himself to the people of this great nation," she said before the show.
Longoria said she hopes to help influence policies, including immigration reform, and hopes Obama will make that his top priority as an economic issue. She called the Latino fundraising effort for the president a historic turning point.
"I think we have a permanent seat at the table, and now we're going to be able to have influence on what affects our communities," Longoria said. "I take civic responsibility very seriously, and I want to do what I can to help my country."