According to The Independent, Riley, 37, gave birth to a baby boy last month.
This is the second child for the couple.
Their first was born in October 2015. However, they never revealed the gender and the name of the child.
The couple, who got married in the South of France in July 2014, have remained fiercely private about their personal lives.
Hardy, 41, is also a father to a 10-year-old son, Louis Hardy, whom he shares with ex-girlfriend Rachel Speed.
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