How can I add colums of another data frame based on values of a common column in R?

Question

I have two data frames, first one is per image data:

ImageNumber Experiment Condition Gene AdditionalColumns
1           A          Control   X    -
2           A          Control   Y    -
3           A          Control   Z    -
4           B          Mutant    ABI  -
...

Second one is per object data:

ImageNumber ObjectNumber AdditionalColumns
1           1            -
1           2            -
1           3            -
2           1            -
3           1            -
3           2            -
3           3            -
4           1            -
4           2            -

I want to add Experiment, Condition and Gene columns to per object data frame according to ImageNumber:

ImageNumber ObjectNumber AdditionalColumns Experiment Condition Gene
1           1            -                 A          Control   X
1           2            -                 A          Control   X
1           3            -                 A          Control   X
2           1            -                 A          Control   Y
3           1            -                 A          Control   Z
3           2            -                 A          Control   Z
3           3            -                 A          Control   Z
4           1            -                 B          Mutant    ABI
4           2            -                 B          Mutant    ABI