Combine multiple datasets based on condition [duplicate]

I'm trying to combine two datasets, based on a condition. This would make it easier for me to analyze if all variables would be in 1 dataset. Both datasets have information in the form of variables (columns) as well as an Identifier variable (also a column). This Identifier variable is present in both datasets. Based on this Identifier variable, I want to copy all the specifc information in the cells from one dataset to another. I've already tried to work with a for loop, an if-then-else function and the mutate-funtion.

Below is an example script, the identifier is ''review.id'', the desired result can be found at the bottom. I have basic experience in R, but combining multiple datasets is new for me.

review.id <- c(1, 2, 3)
car <- c('Audi','Volkswagen','Skoda')
house.value <- c(143000, 187000, 223000)
df1 <- data.frame(review.id,car,house.value)

View(df1)

review.id <- c(3, 1, 2)
city <- c('Berlin','Sydney','Rio')
kids <- c(3, 0, 1)
df2 <- data.frame(review.id,city,kids)

View(df2)

#Desired Result (df3)
#review.id car         house.value city    kids
#1         Audi        143000      Sydney  0
#2         Volkswagen  187000      Rio     1
#3         Skoda       223000      Berlin  3

Thanks in advance! :)