mˈɪlwɔːl dʒˈʌŋkʃən wʌz ˈoʊpənd ˌɔn ˈeɪtiːn dᵻsˈɛmbɚ wˈʌn θˈaʊzənd ˈeɪthˈʌndɹɪd sˈɛvənti wˈʌn, ðə sˈeɪm tˈaɪm æz ðɪ ˌɛlbˌiːˈɑːɹz sˈʌðɚn bɹˈæntʃ dˌaʊn tə mˈɪlwɔːl dˈɑːks ˈoʊpənd, wɪð θɹˈiː plˈætfɔːɹmz tˈuː ɔnðə lˈaɪn tə blˈækwɔːl ænd ɐ sˈɪŋɡəl wˈʌn sˈɜːvɪŋ ðə bɹˈæntʃ lˈaɪn təwˈɔːɹdz nˈɔːɹθ ɡɹˈɛnɪtʃ.
Millwall Junction was opened on 18 December 1871, the same time as the LBR's southern branch down to Millwall Docks opened, with three platforms – two on the line to Blackwall and a single one serving the branch line towards North Greenwich.