(CNN) Olympic swimmer Michael Phelps is the proud father of a baby boy. 
 
 The gold medalist and his fiancee, Nicole Johnson, welcomed their son, Boomer Robert Phelps, last week, he announced on social media. 
 
 "Born 5-5-16 at 7:21 pm!!! Healthy and happy!" Phelps posted. "Best feeling I have ever felt in my life!" 
 
 The new addition to his family comes as the 22-time Olympic medalist is training for his fifth Olympic Games, set for this summer in Brazil. 
 
 "I want to retire how I want to retire -- and I have a great opportunity to do that," he said. 
 
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 Their little champion’s here! Michael Phelps and his fiancée, Nicole Johnson, welcomed their first child together, a baby boy, on Thursday, May 5. 
 
 The Olympic gold medalist shared a precious black-and-white photo of his family on Instagram a few days later, on Saturday, May 7. 
 
 “Welcome Boomer Robert Phelps into the world!!!!Born 5-5-2016 at 7:21 pm!!!! Healthy and happy!!!! Best feeling I have ever felt in my life!!!” the athlete captioned the snapshot. “@nicole.m.johnson and Boomer both healthy!!! #boomerphelps.” 
 
 
 
 In the image, the towering 6-foot-4 athlete cradles the sleepy newborn in his arms while proud mama Johnson looks on from a hospital bed in the background. 
 
 
 
 The pair first announced their exciting pregnancy news via Instagram on Wednesday, November 18, and Phelps, 30, has been candid about looking forward to fatherhood ever since. 
 
 
 
 “One of the coolest things about being a father going into Rio is that our firstborn has the chance to see my last race ever,” the 22-time medalist told Us Weekly in March. “I think that’s something that’ll be really special that we’ll be able to share stories with him, you know, from the time he gets old enough to realize, and I’m excited to have a lot of photos and just to share the moments and memories with him growing up as a kid.” 
 
 
 
 Phelps is set to compete in his last Olympic games this summer in Rio. To learn more about all the Olympic hopefuls, visit TeamUSA.org. The Olympics begin on August 5, 2016, on NBC’s networks. 
 
 
 
 Thank you Auntie @arschmitty for the amazingly cuddly star blanky you gifted #boomerphelps. He's been laying in it since coming home. Goodnight 🌎 & thank you for all the well wishes!! A photo posted by Nicole Michele Johnson (@nicole.m.johnson) on May 7, 2016 at 10:06pm PDT 
 
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– Michael Phelps will compete in the Rio Olympics with an extra set of eyes upon him: He and fiancee Nicole Johnson are the parents of a baby boy, reports US Weekly. Boomer Robert Phelps came into the world on Thursday, and Phelps shared on Instagram photo on Saturday. "Healthy and happy!!!! Best feeling I have ever felt in my life!!!” writes the 22-time Olympic medalist in the caption. Phelps, 30, plans to retire from swimming after the Rio Games in August, notes CNN.