Hailey Baldwin Changes Name To 'Hailey Bieber' ....

Hailey Baldwin is fully embracing married life. The 21-year-old model made her marriage to Justin Bieber Instagram official by changing her handle to Hailey Bieber on Friday. It now appears as "Hailey Rhode Bieber." The news comes weeks after she filed to trademark her married name.

Last month, Hailey filed to register "Hailey Bieber" for the purposes of a clothing line. She also registered her maiden name, "Hailey Baldwin," as well as "HRB3," under her company, Rhodedeodato Corp. Hailey and Justin married in September during a visit to a New York City courthouse.

"The couple kept their marriage a secret from a lot of people. Justin and Hailey wanted to be married, and didn’t want to wait. They still plan to have a more formal wedding, but for them this intimate ceremony was exactly what they wanted," a source told ET last month.