Lee Roth / Roth Stock / Retna Ltd. 1 / 5
Lee Roth / Roth Stock / Retna Ltd. 1 / 5

To honor her husband Spencer Pratt, Heidi Montag has legally changed her name to Heidi Pratt.

"When we filled out the marriage license, I checked the box to change my name to Heidi Pratt," she tells Usmagazine.com exclusively. "It's on my new license, credit cards and everything."

She tells Us it was important to uphold "tradition."

"Now that we're legally married, I wanted to do the right thing," says The Hills star, 22, who tied the knot April 25 in Pasadena, Calif. "I want us to be a family in every way. When we have kids, I want us to all have the same last name."

Will she use Pratt professionally?

"Just like everything else, I'm gonna wing it," she says. "When I did my album, it was still pre-wedding, so I may still be Heidi Montag there."

Rest assured, she tells Us, "I'm Heidi Pratt now."

More on Wonderwall

Check out the official Heidi & Spencer wedding scrapbook

"Seriously, Speidi?" and 9 other ways Hollywood can save the economy

Spencer records hilariously awful new rap song

More on Us Weekly

See Hollywood's most romantic couples

See photos of from Heidi and Spencer's wedding

See photos from when Heidi and Spencer eloped to Mexico