Spencer eloquently described the experience as, "Officially the most lit day of my life". The baby reportedly inherited his parents' blonde hair and has blue eyes.
Spencer and Heidi Pratt - better known as Speidi - have welcomed a son.
Heidi had shared the picture of baby shower on Instagram and captioned it: "So blessed to be surround by the best friends and family!"
At the time of the announcement, Spencer had told Us Weekly of how he found out he was to become a father.
New dad Spencer said he wants his son to be a "social media star".
Speaking previously about the moment she found out she was pregnant, Heidi told Us Weekly: "I felt nauseous and I wanted to know, so I took a pregnancy test. So his is just an 8".
Spencer added: "But he won't be making his debut on Instagram or Twitter - hopefully a tabloid cover, that's the dream".