The One Direction heartthrob visited the couple's three-month-old daughter Alaia-Mai for the first time on Tuesday night and The Saturdays starlet reveals the tot immediately took a shine to the 'Best Song Ever' singer.
Speaking to BANG Showbiz at the 'We're the Millers' UK premiere in London's Leicester Square on Wednesday (14.08.13), she said: "She liked him. She did. He bought her a lovely present."
Niall, 19, spent quality time with pals Rochelle, 24, and JLS singer Marvin, 28, at their home in north London and the trio even posed for a cheeky picture featuring the proud parents bottle-feeding him.
Rochelle posted the snap on Twitter and captioned it: "@MarvinHumes and I doing the night feed ;) @niallofficial (sic)"
The chart-topping 'What About Us' singer hit the red carpet with fellow Saturdays stars Una Healy, 31, Mollie King, 26, and Vanessa White, 23, at the film premiere but the band ordered pregnant bandmate Frankie Sandford, 24, to rest at home.
The brunette beauty is expecting her first child with soccer star Wayne Bridge and new mother Rochelle says she has been giving her plenty of advice as she gets closer to giving birth.
She said: "We told her tonight to take her rest and put her feet up. She wants to come on every night out but I'm like, 'You're pregnant! Sit down and rest.' I tell her she's going to need her rest when the baby gets here ... I know that! So I'm like, 'Just rest!' "
The Saturdays were joined by 'We're the Millers' stars Jennifer Aniston, Jason Sudeikis and Will Poulter at the glamorous premiere.