The 35-year-old star took to Instagram to wish the "Suits" actor and her husband-to-be, where she posted the newly-engaged duo's photograph.
"Congratulations to my girl @meghanmarkle and Prince Harry!! I'm so happy for you Meg! You deserve the best always... Keep smiling that infectious smile," Priyanka wrote.
The "Quantico" star had made Meghan's acquaintance at the annual ELLE Women in Television dinner a few years ago.
The duo have constantly been in touch since then, especially through social media.
Harry, fifth in line to the British throne, engaged to Meghan, confirming months of rumours that the couple was close to getting hitched.
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