updated 07/21/2012 AT 6:55 PM ET
•originally published 07/22/2012 AT 9:25 AM ET
“I was in L.A. [when Harper took her first steps],” Longoria, 37, told PEOPLE at Lay’s “Do Us a Flavor. “I saw the Tweet, but Victoria had emailed me a picture earlier.”
Longoria also celebrated Harper’s first birthday with the Beckhams in L.A. before they flew off to London.
As for the rumors that Longoria is dating New York Jets quarterback Mark Sanchez, the Desperate Housewives star put to rest any gossip. “We’re just friends,” she said.
The two had been seen together on several date-like outings, including a supermarket trip near Sanchez’s Bedminster, N.J., home. But, as Longoria puts it: “I am happy where I am in my life. Very happy.”
She also mentioned that she’ll be rooting for good friend Serena Williams during the Summer Games, adding that watching tennis on TV is one of her favorite pastimes. Williams recently won her fifth women’s singles title at Wimbledon, and is reportedly resting her back before competing in the London Olympics.