Iris Mittenaere was crowned with the DIC crown at the Miss Universe 2016 contest.
As a result of a lawsuit between IMG and Diamonds International Corporation (DIC), she wore the Diamond Nexus Crown from March 2017 until the end of her reign.

In her capacity as Miss Universe, she served as a judge at Puteri Indonesia in Jakarta, at Miss Egypt in Cairo where she visited the Great Pyramid of Giza, at Miss Peru in Lima, at Miss Guyana held in New York City and at Miss Diva in Mumbai, then visited the Taj Mahal.

As a global ambassador, she attended diplomatic events at the Embassy of France in Cairo, the Embassy of France in Manila, the Embassy of the United States, Manila, the Consulate general of France in New York, the Consulate general of France in Alexandria and was invited to Emmanuel Macron's speech to the French expat community at the Kaufmann Concert Hall of 92Y in New York City.
She traveled to Bali, Indonesia to shoot a commercial for C 1000, a vitamin brand available in Indonesia and attended Farouk Systems's Global Conference in Cancun, Mexico.

As a charity ambassador for Smile Train, she traveled to Mexico City and Cap-Haïtien to visit cleft lip and cleft palate patients and witnessed first-hand a cleft surgery.
As the newest Madrina of the Latino Commission on AIDS, she attended the Annual fundraising Cielo Gala to benefit the Latino Commission on Aids and was also invited to Project Sunshine's 14th Annual Benefit Celebration Bright together in New York City.

At New York Fashion Week, she walked the runway twice at Sherri Hill's fashion show in February and September 2017.
In June 2017, she attended Joyrich x Snoop Dogg's Fashion show at MADE LA 2017 in Los Angeles and was invited to the AmfAR generationCURE Solstice 2017 in New York City.
In an interview with USA Today, Mittenaere talks about the secret to 'French girl style' and how it is manufactured.

In March 2017, during her week-long homecoming celebration in Paris and in her hometown of Lille, France, Iris Mittenaere was invited by the President of France, François Hollande, at the Élysée Palace and was attributed a regional award by the President of Hauts-de-France, Xavier Bertrand.

In her native country, France, she returned for a visit to walk the runway at the Jean Paul Gaultier's fashion show at Paris Fashion Week, to climb the steps of the Palais des Festivals at the 2017 Cannes Film Festival and to attend the AmFAR Charity Event, "Cinema against AIDS", in Cannes.

During her reign as Miss Universe, Iris Mittenaere traveled to the Philippines, Indonesia (twice), Haiti, Cayman Islands, Ecuador, Mexico (twice), Peru, India, Egypt and numerous trips around the United States and France.

For her last walk as the reigning Miss Universe, Iris Mittenaere wore a Michael Cinco scarlet red ombré Couture gown, in full Swarovski crystals, which featured a fitted bodice and flowing train, before passing on the crown to her successor Demi-Leigh Nel-Peters of South Africa as Miss Universe 2017 on 26 November 2017 at Planet Hollywood Las Vegas in Las Vegas, Nevada.

From 4 to 9 December 2017, she participated to the Miss Universe's Christmas Tour in the Philippines, alongside her successor Demi-Leigh Nel-Peters and predecessor Pia Wurtzbach, then served as co-president of the jury with Jean-Paul Gaultier at Miss France 2018, appearing on stage with the five finalists as a part of the fashion swimsuit portion of the competition and putting an end to her international pageant career.

In December 2017, a documentary film about her Miss Universe reign, produced by Endemol Shine Group and titled From Miss France to Miss Universe, the fabulous destiny of Iris, was broadcast on TF1 and watched by 5.4 millions viewers in France.
The camera crew followed Mittenaere's reign as Miss Universe, her humanitarian travel, her trips and homecoming in France, and her family's reaction to her new life.
Iris Mittenaere was crowned with the DIC crown at the Miss Universe 2016 contest. As a result of a lawsuit between IMG and Diamonds International Corporation (DIC), she wore the Diamond Nexus Crown from March 2017 until the end of her reign.
In her capacity as Miss Universe, she served as a judge at Puteri Indonesia in Jakarta, at Miss Egypt in Cairo where she visited the Great Pyramid of Giza, at Miss Peru in Lima, at Miss Guyana held in New York City and at Miss Diva in Mumbai, then visited the Taj Mahal. 
As a global ambassador, she attended diplomatic events at the Embassy of France in Cairo, the Embassy of France in Manila, the Embassy of the United States, Manila, the Consulate general of France in New York, the Consulate general of France in Alexandria and was invited to Emmanuel Macron's speech to the French expat community at the Kaufmann Concert Hall of 92Y in New York City. She traveled to Bali, Indonesia to shoot a commercial for C 1000, a vitamin brand available in Indonesia and attended Farouk Systems's Global Conference in Cancun, Mexico.
As a charity ambassador for Smile Train, she traveled to Mexico City and Cap-Haïtien to visit cleft lip and cleft palate patients and witnessed first-hand a cleft surgery. As the newest Madrina of the Latino Commission on AIDS, she attended the Annual fundraising Cielo Gala to benefit the Latino Commission on Aids and was also invited to Project Sunshine's 14th Annual Benefit Celebration Bright together in New York City.
At New York Fashion Week, she walked the runway twice at Sherri Hill's fashion show in February and September 2017. In June 2017, she attended Joyrich x Snoop Dogg's Fashion show at MADE LA 2017 in Los Angeles and was invited to the AmfAR generationCURE Solstice 2017 in New York City. In an interview with USA Today, Mittenaere talks about the secret to 'French girl style' and how it is manufactured.
In March 2017, during her week-long homecoming celebration in Paris and in her hometown of Lille, France, Iris Mittenaere was invited by the President of France, François Hollande, at the Élysée Palace and was attributed a regional award by the President of Hauts-de-France, Xavier Bertrand.
In her native country, France, she returned for a visit to walk the runway at the Jean Paul Gaultier's fashion show at Paris Fashion Week, to climb the steps of the Palais des Festivals at the 2017 Cannes Film Festival and to attend the AmFAR Charity Event, "Cinema against AIDS", in Cannes.
During her reign as Miss Universe, Iris Mittenaere traveled to the Philippines, Indonesia (twice), Haiti, Cayman Islands, Ecuador, Mexico (twice), Peru, India, Egypt and numerous trips around the United States and France.
For her last walk as the reigning Miss Universe, Iris Mittenaere wore a Michael Cinco scarlet red ombré Couture gown, in full Swarovski crystals, which featured a fitted bodice and flowing train, before passing on the crown to her successor Demi-Leigh Nel-Peters of South Africa as Miss Universe 2017 on 26 November 2017 at Planet Hollywood Las Vegas in Las Vegas, Nevada.
From 4 to 9 December 2017, she participated to the Miss Universe's Christmas Tour in the Philippines, alongside her successor Demi-Leigh Nel-Peters and predecessor Pia Wurtzbach, then served as co-president of the jury with Jean-Paul Gaultier at Miss France 2018, appearing on stage with the five finalists as a part of the fashion swimsuit portion of the competition and putting an end to her international pageant career.
In December 2017, a documentary film about her Miss Universe reign, produced by Endemol Shine Group and titled From Miss France to Miss Universe, the fabulous destiny of Iris, was broadcast on TF1 and watched by 5.4 millions viewers in France. The camera crew followed Mittenaere's reign as Miss Universe, her humanitarian travel, her trips and homecoming in France, and her family's reaction to her new life.
Iris Mittenaere