Luisana Lopilato said Noah, her three-year-old son with Michael Bublé, is "well" following treatment for cancer in Los Angeles.
Speaking in Spanish at a press conference for a new film project in her native Argentina on Monday, the actress and model said that Noah has a long return to healthy ahead of him.
The experience has made her price life more, she said.
The family last shared an update on Noah in February, when they said he was progressing well in his battle against the illness.
Our gratefulness to his doctors and caretakers cannot be put into words. We'd also like to thank the thousands of people that have sent their prayers and good wishes to us. As we continue this trip, we are greatly comforted by your support and love."
They announced Noah's cancer diagnosis in November, but have not said what type of cancer he has or exactly when he was diagnosed.
The couple also has another son, Elias, who turned one earlier this year.
Bublé had a busy timetable planned after relieving his ninth studio album, Nobody But Me, last fall, but withdrew from a number of major international appearances — including hosting this month's Juno Awards — to focus on his son's care.
Burnaby, B.C.-born Bublé is multiple Juno and Grammy Award-winning singer whose albums include Come Fly with Me and Caught in the Act. He has sold more than 50 million records and fulfilled around the world.