He recently shared a touching tribute to her to mark one year since they met.
And on New Year's Day on Wednesday, purple Wiggle Lachlan Gillespie shared a sweet snap from when he met ballerina girlfriend Dana Stephensen's four-year-old son, Jasper.
Taking to Instagram, Lachy, 34, can be seen posing with Dana and Jasper, before Dana shared snaps herself and said that she was the 'luckiest girl because of these two.'
It's getting serious! Purple Wiggle Lachlan Gillespie met girlfriend Dana Stephensen's son Jasper, four, this week... with the ballerina saying that she's the 'luckiest girl because of these two'
Lachy captioned his picture, which appeared to be taken on a trampoline: '2020,' adding purple love heart emojis.
In the snap, Dana and Jasper hug Lachy.
Dana also shared a snap of herself and Lachy with Jasper on their shoulders, and another on her story, writing: 'The luckiest girl because of these two.'
Sweet: Dana also shared a snap of herself and Lachy with Jasper on their shoulders, and another on her story, writing: 'The luckiest girl because of these two'
Getting along well! The trio all beamed in the snaps and appear to get along well
Family ties: Dana shares her son Jasper with her ex-husband, freelance photographer Michael (left)
Dana shares her son Jasper with her ex-husband, freelance photographer Michael.
She previously told Daily Mail Australia about motherhood, having returned to the stage nine months after giving birth.
'Motherhood teaches you so much and it opens up this treasure box of new things that you explore and performing is so much about life