'Sister Wives' Kody Brown Has Chosen to 'Restructure' His Family

— -- "Sister Wives" star Kody Brown has decided to restructure his family, including his four wives.

Brown, 44, ended his legal marriage to his first wife Meri, 44, last summer and decided to legally marry his youngest wife, Robyn, in December, according to court documents.

"We have chosen to legally restructure our family," the Brown family told ABC News via a statement. "We made this decision together as a family. We are grateful to our family, friends and fans for all their love and support."

Despite the legal shift between the two wives, Brown's four wives -- Meri, Christine, 42, Janelle, 45, and Robyn, 36 -- will all still be very much a part of the family.

The change is only in a legal sense, according to People magazine.

Brown legally married his first wife Meri in 1990. The other wives were married in spiritual ceremonies only until this change.

The TLC reality series "Sister Wives" has followed Brown and polygamist family -- including Brown's wives and his 17 children in all -- since 2010.

The show airs Sundays at 9 p.m.