The "Pulp Fiction" star honored his late wife with a moving montage set to Barbra Streisand's rendition of "That Face."
Kelly Preston has died aged 57. The actress, model and wife of John Travolta, had privately been having treatment for breast cancer for the past two years.
The actor's son died in 2009 from a seizure during a family vacation in the Bahamas.
The father of three posted two snapshots on Instagram of his family, writing to Preston on his first Mother's Day since her death that he loves and misses her.
The star, whose wife died in July, thanked his fans via Instagram for "supporting me in such an incredible way.”
“She fought a courageous fight with the love and support of so many," her husband, actor John Travolta, said Sunday.
Preston and John Travolta's son Jett died in 2009 after having a seizure.
Jett died after having a seizure while in the Bahamas with his family.