Bruce Willis' wife, Emma Heming-Willis, shared an adorable photo of baby Evelyn and 2-year-old Mabel Credit: Courtesy Emma Heming Willis

Sisterly love is strong in the Willis home! Bruce Willis' wife, Emma Heming-Willis, shared an adorable photo on Tuesday, May 27, of newborn daughter Evelyn Penn bonding with her older sister Mabel Ray.

The picture, posted to Heming-Willis' Instagram account, shows young Mabel, 2, gently cradling her little sister's head, while Evelyn, 3 weeks, gazes up at her in awe. "The start of a beautiful friendship," the girls' proud mom captioned the snapshot. 

This is the second picture Heming-Willis has shared of her bundle of joy. On Saturday, May 24, she posted a picture to her Facebook page in which she can be seen breastfeeding the sweet tyke.

As previously reported, Willis, 59, and his model-actress wife, 35, welcomed their second daughter together on Monday, May 5, in L.A. The Die Hard actor is also dad to daughters Rumer, 25, Scout, 22, and Tallulah, 19, with ex-wife Demi Moore.

"Bruce is adorable with Mabel and all of his girls," a source previously told Us of the star. "It's hilarious to see the tough guy stereotype just melt away. He'll put on a baby voice, get cute with her. Being a dad is no doubt the most important thing for him."