02/14/2014 at 11:00 AM EST
No, she's not starring on Modern Family
– Hilary Duff
is just showing off her own unconventional brood.
The actress/singer, 26, posted a cozy Instagram
from her tropical vacation Friday. Her travel buddies? Son Luca
, 22 months, and husband Mike Comrie
, 33. The two announced their split
in January, but it looks like the Lizzie McGuire
child star is keeping her promise of an amicable relationship.
"#modernfamily #vacation #juicypear," Duff captioned the family photo, in which little Luca digs into a fruit as he is held by Comrie, who keeps Duff wrapped under his arm.
The family also hit the beach, where Duff wrote a romantic message ("Happy Valentines Day") in the sand, according to an earlier Instagram
Duff and Comrie wed in August 2010
. Their separation shocked fans, but they vowed to co-parent their son.
"They remain best friends and will continue to be in each other's lives," Duff's rep told PEOPLE at the time.