19-year-old Danielle arrives on Albert Square and quickly captures the attention of fellow newcomer Callum Monks (Elliott Jordan), who will be seen on screens for the first time in August.
The romance plot becomes more complicated when Callum also sets his sights on Stacey Branning (Lacey Turner), soon after she hires Danielle to work on her market stall.
Lauren, 22, revealed: "I'm thrilled. It's a great first role and I just can't wait to see what is in store."
Producer Diederick Santer added: "Lauren is a real find - a lovely, talented and hugely watchable actress.
"I'm delighted she's making her professional debut with us, at the start of what I'm sure will be a glittering and accomplished career."
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