The loved-up couple announced the happy news on Friday night (15 August).
Jacqueline, 21, told the Mirror: "We are thrilled by our news."
Dan, 23, added: "Becoming a father has been the most amazing thing to ever happen to me. I can't believe I'm going to be a dad again – I'm truly blessed."
The pair, who surely must be one of the most gorgeous pairings in showbiz, first started dating in 2013 and then reunited again in June this year.
The TOWIE hunk even admitted he was "in love" with Jacqueline during a recent episode of the Essex reality show, saying: "I would say I'm in love. I'm happier than I've ever been."
A spokesperson for mum-to-be Jacqueline told the newspaper: "Everyone at EastEnders is thrilled for Jacqueline [who plays Lauren Branning]."
Dan already has one son, eight-month-old Teddy, with his previous girlfriend. The reality TV star has proved a doting dad and has shared lots of super cute pictures of his son on Twitter.
It's proving to be a HUGE year for Dan, who has just signed up to tour with male stripping group the Dreamboys in September.
Huge congratulations guys!
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