Gisele Bündchen and Tom Brady are making some major post-season plans after getting engaged in Los Angeles over the weekend, PEOPLE has learned.

The New England Patriots quarterback, 31, proposed with a diamond solitaire to the Brazilian supermodel, 28, on Friday.

“He asked and she accepted,” a source close to the couple tells PEOPLE. Family and friends were informed over the weekend. An official announcement, as well as preliminary wedding details, are being planned by Bündchen and her closest friends this week.

“The couple is discussing a huge fashionista event in the spring or a more intimate and quicker ceremony in Costa Rica, where Gisele has a home,” the source adds.

While engagement rumors flew – and were denied – before Christmas, the January engagement will mark the first marriage for both.

Bündchen’s agent told PEOPLE, “We don’t comment on our clients’ private lives.”

Though Bündchen had ended her longtime relationship with Leonardo DiCaprio in 2005, Brady was romantically involved when the couple met. Shortly after, he broke off his relationship with actress Bridget Moynahan.

In August 2007, Moynahan gave birth to Brady’s son, John Edward Thomas.

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