The couple wed earlier this month, in a ceremony which aired as a standalone TLC special, but Lachey has admitted that their relationship feels the same as it always has.
"It doesn't feel any different, which I think is a great thing," he revealed to People. "I think that means it was good to begin with.
"We're just very comfortable and happy in our life together, so now we are back to work and back to the routine."
Lachey will return to television later this year for the third season of NBC a cappella singing competition The Sing-Off, and also said that Minnillo is very supportive of his career.
"She is frequently backstage and very supportive and she's a great hosting resource for me," he added. "She's always there when I need her."
The Wipeout host recently revealed that the couple wrote their own wedding vows, in an effort to make the event feel "more personal".
The Sing-Off begins on NBC on September 19.