The proposal and wedding arrangements were unknown.
In 2019, Bezos and Sánchez, a former broadcast journalist and philanthropist, announced their relationship.
Bezos and Sánchez have kept their relationship covert, except for photos at occasions.
The couple's first combined interview with CNN was in 2022 at their Washington DC home.
When they discussed their humanitarian efforts to strategically donate Bezos's huge riches to various charities.
Sánchez told CNN that they are "really great teammates" and "kind of boring" when it comes to charity.
Bezos called the Emmy-winning journalist “the most generous, most big-hearted person that you would ever meet” and “an inspiration.”
The millionaire creator of Blue Origin flew on a 2021 New Shepard rocket launch into space and back.
Bezos had four children with MacKenzie Scott, his 25-year wife. Sánchez divorced Hollywood agent Patrick Whitesell in 2019 after 13 years of marriage.