Time flies when you're busy changing nappies.
Vogue knows this element of motherhood all too well, it seems like we blink and they've gotten bigger.
The model reminisced about how tiny Theodore used to be on Instagram.
The little boy is seen in a beautiful red striped, sailor baby grow, teamed with the cutest pair of red socks.
Vogue wrote under the snap: "He looks so tiny here...Ahhhh how do they grow so fast! I don't ever want to leave his side."
Theodore was born on September 5 and to show just how big he has gotten since then, his dad, Spencer Matthews uploaded a picture of his son snoozing.
The two-month-old has really grown into himself and looks considerably bigger.
If Vogue's latest interview with Breakfast Republic is anything to go by, they could be holding another newborn very soon.
The 33-year-old confessed that she's very eager to add another member to their family dynamic.
She said: “I want to have more kids now. Honestly, I could possibly go again now. Maybe at the end of next year, we’ll start trying again.”
We won't be surprised if Theodore becomes a big brother in the very near future.
Either way, Vogue and Spencer have been lapping up every moment of parenthood and seem to be loving every moment of it.