讲述一群不同的人，他们其中一些人的共同点就是「同一天生日」，他们的生活故事以有趣的方式交叉在一起。 Mandy Moore扮演Rebecca, Jack可爱的妻子也是最好的朋友。搬到匹兹堡后生了三胞胎。Milo Ventimiglia饰演Jack。 Justin Har tley 扮演Kevin, 一个英俊且当红的电视演员，有着异常无趣没有终期的单身生活。 Sterling Brown扮演Randall,衣着光鲜亮丽在纽约工作的顾家生意人。与老婆Beth 合作无间地养育着两个女儿。 Susan Kelechi Watson 扮演Beth，Randall老婆 Ron Cephas Jones 扮演William, Randall的生父。在Randall一出生的时候就遗弃了他。 Chrissy Metz 扮演Kate, 跟很多女人一样烦恼着饮食和身材. 她用便条贴贴满整个公寓来体型自己要控制饮食。她是Kevin的孪生姐姐，但是各方面跟Kevin完全相反。

After a devastating loss of a member of his family and a nervous breakdown, Randall decides to change all their lives by making some bold decisions in order to honour the legacies of his father(s). Kate finally decides to pursue a career in singing, supported by her fiancé Toby, which will put their relationship to the test. Meanwhile, Kevin is reunited with his first love Sophie and about to become a huge movie star, until the ghosts of his past catch up with him. Turns out that "The Big Three" depend on Jack and Rebecca - in more ways than they allow themselves to admit it.

NBC剧集《我们这一天》宣布一次性续订2、3季，这部Dan Fogelman打造的大热剧是这个秋季档收视人数第二的广播网剧情剧。新续订的两季还是每季18集。

NBC宣布一次性续订《#我们这一天#》三季，即第四、五、六季，每季18集。