Terri Irwin honored her late husband Steve by posting a cute throwback photo on social media.

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"Today would have been our 25th wedding anniversary. I miss you so very much, and I am grateful every day for the time we had together," Irwin tweeted Sunday.

The message captioned a black and white photo of her kissing Steve with a lizard standing on both of their heads.

The Australia Zoo owners, who starred on the popular "The Crocodile Hunter" reality series, married in 1992. Steve died in 2006 when a stingray barb pierced his chest. He was 44.

They have two children -- 18-year-old former "Dancing with the Stars" champion Bindi Irwin and 13-year-old conservationist Bob Irwin.

Last month, Terri said she and Steve had planned to have a third child, but ran out of time. She also said she has not dated anyone since her husband's death.

Today would have been our 25th wedding anniversary. I miss you so very much, and I am grateful every day for the time we had together. pic.twitter.com/Ztzoclhvyt- Terri Irwin (@TerriIrwin) June 4, 2017