Natalie Portman and Benjamin Millepied took their son on their honeymoon because they would have missed him too much to leave him behind.
The couple jetted out to Turks and Caicos in the West Indies at the beginning of the month for a romantic break but couldn't leave 15-month-old son Aleph behind.
A source told Life and Style magazine: ''This break was very precious to them, even though it was brief. It's typical of them - even their honeymoon was a whirlwind.
''They used the time to be together. No work, no business calls. Natalie and Ben are the hardest working people. Even before the baby came along, they were non-stop so you can imagine how exhausted they've been since Aleph was born.''
The happy family blended in with other holiday makers and spent most of their time playing and relaxing on the beach.
A source said: ''They made silly faces to make Aleph laugh and they all looked like they couldn't have been happier.
''Natalie and Benjamin enjoyed a romantic moment as they headed out towards the horizon together. They just kept kissing and looked really in love.''