The couple posted a shot of themselves on Instagram holding the first scan of their baby less than a year after they married.
The British Olympian, 23, and the Oscar-winning director, 43, tied the knot in May 2017 at Bovey Castle in the UK.
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White won his first Olympic gold medal at age 19 at the 2006 Turin Olympics. Speedskater Bonnie Blair won gold in the 1988, 1992 and 1994 Games.
While screenwriter Dustin said: "A very happy #ValentinesDay from ours to yours".
Some have speculated that Daley and Black are expecting a boy, as the emoji of a family that they chose to use in their captions seemingly depicts a male child. "We're both lucky to have supportive families and we want to share that with our own children", he said.
"We're not planning to have children immediately, but we do want them in the future".
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Regarding the Syrian regime itself, either during or after the conflict; "it will be answerable to worldwide justice" he added. But Defense Minister Florence Parly was more reserved on February 9 when asked if Damascus had crossed the "red line".
Within minutes of the picture being uploaded, the pair, who got married previous year received thousands of likes and comments.
Tom was also accused of having an 18-month fling with model Edward Williams behind Black's back in February previous year, but this rumour was put well and truly behind them when they married months later.
Dustin added: "When Tom and I met four years ago, I knew instantly that I was in trouble".
Alternative ways to spend Valentine's Day
For a less dramatic way to handle this Hallmark holiday, here are seven Valentine's Day tips that even the haters will love . Still. not very romantic . "Whatever you can buy in the store is not as valuable as the time you can give with someone".
Daley is a dual world champion in the 10m platform and was the 2012 London Olympic bronze medallist in the same event.