The reality star took to Twitter to share a sweet snapshot that shows the tiny baby girl clutching her fingers. "Auntie loves you xxxx," she wrote alongside.
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Sam Faiers shared this sweet photo taken with her newborn niece
An hour earlier, Sam told her 1.28 million followers, "Love being with my baby niece, she's been such a good girl love u xxxx."
Sam's sister Billie Faiers welcomed her firstborn last week – so far the baby's name has not been revealed.
Announcing the happy news on Twitter, the TOWIE star – who is engaged to long-term boyfriend Greg Shepherd, wrote, "We are so excited to announce the birth of our beautiful baby girl... We are so happy and the proudest mummy and daddy in the world."
Proud auntie Sam Faiers acted as a birthing partner for sister Billie
Sam has proven herself invaluable to her big sister. Not only is the 23-year-old a hands-on auntie, but she also acted as a birthing partner during Billie's gruelling 32 hour labour.
Days after welcoming her baby, grateful Billie posted a special message to her sibling. "Laying here thinking how fantastic my sister @SamanthaFaiers was as one of my birthing partners. I couldn't have done it without you x," she wrote.