His time as an only child is limited.
So Luca got to enjoy mom Hilary Duff all to himself during a fun day out on the beach on Saturday.
The actress posted a sweet snap on Instagram as she posed with her six-year-old son.x
Mommy and me: Hilary Duff showed off her pregnant belly in a bikini as she posed with son Luca on the beach on Saturday
'My sweet sweet boy. Oh the adventures we’ve had,' she captioned the pic, adding a little heart emoji.
Luca looked cool in a grey tank top and blue trunks, surrounded by buckets full of sand ready for construction.
The 30-year-old's impending daughter meanwhile was cooking away in her burgeoning belly, which was on full display.
The Younger star showcased her bump in a black bikini, which she paired with a green sarong wrap.
Princess en route: Hilary and boyfriend Matthew Koma revealed the pregnancy news on June 8 to their Instagram followers
Hilary and boyfriend Matthew Koma revealed the pregnancy news on June 8 to their Instagram followers.
'Guess what guys! @MatthewKoma and I made a little princess of our own and we couldn't be more excited!!!!' she declared.
Luca's father is Hilary's ex husband and former hockey player Mike Comrie, to whom she was married from 2010 to 2016.
Hilary and Matthew briefly broke up in March 2017 before reuniting in September of that same year.
She spoke about getting back with him after their on/off/on again romance in December on The Talk
Hilary said: 'Timing is such a big deal. Third time's a charm!... It's going so great! I mean, this is like the third time that we've dated.'
Hilary continued during her appearance: 'I think that you have history and a past with someone and love, and just because it doesn't work out the first time, the second time, as long as there's not too much damage done, then, it can always workout again.'
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