The 43-year-old American has won seven Wimbledon women's doubles titles and her total of 19 Wimbledon crowns overall in singles, doubles and mixed doubles is just one short of Billie Jean King's all-time record.
"It's gonna be the first time I go back as a player since 1995," Navratilova said.
"It's gonna be fantastic and I'm looking forward to it.
"I will have lots of fun and enjoy myself. I still can hit the ball you know."
The 43-year-old American has won seven Wimbledon women's doubles titles and her total of 19 Wimbledon crowns overall in singles, doubles and mixed doubles is just one short of Billie Jean King's all-time record.
"It's not something I had planned at the beginning of the year," Navratilova said.
"I just thought that because I will be playing Team Tennis in July that I needed matches. What better way to get ready than to play at Wimbledon?"
Navratilova, who retired in November of 1994, will also play doubles at Eastbourne, one week before Wimbledon, with de Swardt as a wild card entry.
"I don't miss professional tennis," she said. "I have a great life now. My goal is to improve as a human being."