The news of Parker's engagement comes two and a half years after splitting from Longoria amid rumours he cheated on her, reported Contactmusic.
The 'San Antonio Spurs' star, 31, was spotted shopping for engagement rings last week and told a fan on Twitter that his favourite way to relax after a basketball game is to "spend time with my fiance".
He also hinted that the couple are planning an exotic honeymoon and said his three favourite places to go on holiday are "The Maldives, Tahiti and a safari anywhere in Africa".
"I was not eating. I was depressed. I was sad. My diet was coffee. So people kept saying, you look amazing. Divorce agrees with you. And I was like, I don't feel good. I have no energy. I didn't know I was depressed. I mean, I knew it was a sad moment in my life, but I wouldn't categorise myself as depressed.