Tish also joined the family in the Land Down Under to ring in the New Year and appears to get along rather well with Leonie, as the duo posed for a pic with the mother of Hemsworth's sister-in-law, Elsa Pataky.
"Family! #inlaws (no law)," Cyrus captioned the happy snap.
The actor has also been embraced by the Cyrus clan, as he was snapped celebrating with his longtime love's family just before the holidays.
For more on the adorably reunited couple's families, watch the clip below.