You just met Cody Simpson's little sister, Alli! The siblings are only 15 months apart, and they are basically BFF status.

It's actually really refreshing to see two siblings spending so much time together. Cody is always bringing Alli along to high-profile events, and the pair are always hanging out when they have time off from their busy schedules (with Cody constantly touring and Alli working on jumpstarting her career in modeling, acting and blogging).

It's obvious that the Simpson siblings have shared a special bond since they were babies, as you can see in the super cute picture Alli tweeted below! Say it with us now, "Awwwwwwwwww!"