Kourtney Kardashian & Mason Wave Hello

Adorable Mason Disick, 5 months, joined his mom Kourtney Kardashian and aunt Khloe yesterday as they made their way into the Jimmy Kimmel Live studios (June 10). The reality star sisters were all dolled up for their tv appearance.

Khloe recently said of her big sister's transition into motherhood:

I have loved every minute of watching your transformation from crazy Kourt to loving mommy, and Mason is so lucky to have you. I feel truly blessed that I got to witness this beautiful transition in your life."